The episode starts with Gumball asking Darwin several random questions on the bus, like his best dance move, best face, and best party trick. When Rocky drops Penny off, Gumball looks out the window to Penny and does a funny face, and Penny laughs as the bus leaves. Gumball then asks Darwin where he would have a special place to do something special for someone. They start coming up with ideas and laugh like little girls, eventually shattering car windows. Gumball asks Darwin who he would invite, they answer simultaneously, and Gumball answers "Penny," while Darwin answers "you."
After Gumball and Darwin are dropped off by the bus, Darwin starts yelling at Gumball about not making a scene. Gumball goes to the store, leaving Darwin in the driveway. Darwin is jealous of Penny and states that he will "get dirt on her," to reveal that she is a horrible person.
Next is a compilation of Darwin spying on Penny, every time featuring Penny saying "Hi Darwin... bye Darwin." After this Gumball has a date with Penny at the schoolcafeteria, where he is going to propose. Darwin shows up and ruins the whole thing. Eventually, Darwin starts being mean to Penny, in this case at the gym in basketball, with him hitting Penny with the basketball. Gumball then gets mad at him, causing Darwin to leave and Penny to sigh at this.
After these events, Gumball is in the library ready to propose to Penny. When he walks up to her, and says he has something to tell her, she also has something to say. Gumball counts down from three so they can tell each other what they have to say at the same time. On two, Penny suggests that they stay separate for a while, which shocks Gumball. Penny says that she wants everything to clear up between Gumball and Darwin. Gumball rushes off towards home. When he gets to his room, Darwin is dressed in a horribly made cardboard costume of Penny. Gumball asks what he is doing, and Darwin says "Whatever I can do so you can love me again." Gumball starts crying, and asks Darwin if his affection for Penny is weird. Gumball tells Darwin that he was going to propose to Penny, and Darwin says that that is weird. Darwin says he can give Gumball the “perfect moment.” Gumball then asks where are they going to find a log cabin and starts doing his favorite R&B dance and telling Gumball to "come on."
That night, Darwin knocks on Penny's door and runs away. Penny answers it, and sees origami roses making a path to the Wattersons' shed. In front of the shed, there is a puddle of antifreeze, meant to be a blue lake, and a jar containing flies with small firecrackers attached, representing fireflies. When Penny enters, Gumball is lying on the ground, making a weird face. He asks Penny to sit down on the floor. Penny tries to hold in her laughter, and sits on the floor. Gumball reads some footnotes, and offers Penny a soda. When he pours the drink in the cup, he drops a ring in. He gives Penny the cup, and says "to us." He starts to laugh in a strange way. Due to the awkwardness, he claps, and yells "chocolate fountain!" Darwin starts blowing chewed up chocolate through a hose, and it gets all over Penny. Gumball then tries to propose, but is too nervous to do so. Then, Penny takes a sip of the drink and starts choking on the ring. Darwin nervously starts telling Gumball to "come on," and hits his head on a jar of fireflies, causing it to break. Fireflies start going everywhere, and set the roses on fire. Penny starts shapeshifting randomly, and a firefly flies into the antifreeze, and it explodes. Darwin rushes into the shed, squishes Gumball's cheeks into sounding out the words "will you marry me," and gets all three of them out of the shed before it explodes.
The three land on the ground, and Penny coughs out the ring. Penny asks Gumball what he said, and he picks up the ring and says finally asks Penny to marry him. She says she cannot because they are twelve. Penny has an idea for what to do with the ring, and she uses for as a bro-like wedding for Gumball and Darwin. The episode ends with the Fitzgeralds' house on fire, with the origami roses catching fire as well.
In "The Flower," it is stated that Darwin is immune to Jealousy, so it is likely that Gumball hanging out with Penny more is the first thing to ever trigger jealousy in Darwin (which he shows briefly in "The Burden").
Gumball and Penny are dating following the events of "The Shell."
This is the second time Penny refuses to marry Gumball due to the fact they're both twelve years old. The first was in "The End."
A cue from "The Authority" (when Granny Jojo first appears) is reused when Penny says to Gumball that they need some space.
While choking on the wedding ring Gumball snuck into Penny's drink, one of her transformations resembles the Gorgons from Greek mythology.
While dancing on the bus, Gumball and Darwin can be heard humming a song that sounds very similar to Seal's "A Kiss from a Rose." This is a highly logical inference, as Gumball had previously mentioned R&B music.
The scene in which Penny and Gumball find themselves eating the same piece of spaghetti is a parody of a famous scene from the movie Lady and the Tramp. In the movie, the scene ends with the two characters accidentally kissing, but in the episode, Darwin interferes before such a thing could happen.
In the first scene, Carmen is sitting towards the back of the bus, behind Gumball and Darwin. When Penny gets off the bus, however, Carmen appears in front of them.
When Gumball glides off the bus with a shocked face, the bus's doors are on the left side instead of the right. In all of its other appearances, the school bus's doors are on the right, mimicking the typical American school bus.
Banana Joe's size is inconsistent through the episode, with him being as large as Tobias, Gumball, and Darwin in the first scene.
When the basketball game starts, one of Gumball's armbands goes missing.
When the Wattersons' shed explodes, Penny's left antler disappears briefly in one shot.
In several shots inside the shed, Penny's eyelashes are orange instead of white.
In the scene where multiple Darwins crowd around Gumball and complain about Penny, most of them do not have eyelashes. In fact, the first few Darwins do have eyelashes, but they vanish in between shots.
When Penny follows the trail of roses, two roses are placed on a car, but when they are seen burning, the same two roses are now in front of the car.
When Penny looks back after Darwin briefly kisses Gumball in the cafeteria, her right (viewer's left) antler is briefly misaligned.
[Darwin does his best dance move, sliding from side to side in his seat]
Darwin: What's yours?
Gumball: Cossack dance, but there's a problem with it.
[Gumball gets off of his seat, and dances. He repeatedly kicks himself in the face as he does so]
Gumball: My torso's too short.
[They both laugh. Gumball goes back to his seat]
Darwin: What's your best face?
[Gumball does his best face. He pulls his eyes (literally) forward]
Gumball: What's yours?
[Darwin shows his best face. They laugh again. The bus stops, and Penny gets off]
[Gumball sees Penny, and they stare at each other affectionately]
Darwin: And what's your best party trick?
[Gumball sticks his finger into a nostril and it comes out through his head. He wiggles it around, flapping his ear in the process. Penny laughs and walks off]
Gumball: Oh, by the way, there's something very personal I wanted to ask you. If you had to do something really, really special for someone really, really important, what would be the best place ever?
Darwin: [Inhales deeply] It would be a log cabin.
Gumball: Yes! By a blue lake.
[They squeal like girls]
Gumball: And there would be fireflies!
Darwin: And mason jars!
[They squeal again]
Gumball: What else?
Darwin: A fireplace!
Gumball: A bearskin rug!
Darwin: A chocolate fountain!
Gumball: And R&B music!
[They squeal with a very high pitch, so high that their squealing destroys the windows of the nearby cars that the bus passes by. They start dancing and imitating R&B music. Tobias and Banana Joe stare at them, disturbed. Gumball and Darwin notice, and stop]
Gumball: So, who would you invite?
Darwin: Never you mind!
Gumball: Oh, come on! Tell me!
Darwin: No, you first!
Gumball: Oh, fine. [singsong voice] But you gotta say yours at the same time. On three. One. Two. Three. Penny!
[They are both surprised. Darwin is angry and Gumball is shocked]
Gumball and Darwin: WHAT!?
[The bus stops, and the brothers get off]
Darwin: I AM NOT MAKING A SCENE!
Darwin: AND I'M NOT JEALOUS OF PENNY!
Gumball: Dude, don't freak out. There's enough space in my life for the both of you.
[Many Darwins appear around Gumball, crowding him]
Darwin: She's crowding us!
Darwin: She's suffocating us!
Darwin: She's oppressing us!
Darwin: She's smothering us!
[They all speak at once, disappearing as Gumball interjects]
Gumball: Okay, enough! I wanted your opinion on something important, but if it's gonna be like this, then just go home! I need to go to the store anyway.
[Darwin's anger turns into sadness, and he begins to sob. Suddenly, he becomes angry again]
Darwin: BACK OFF, PENNY FITZGERALD! HE'S MY BROTHER FROM ANOTHER MOTHER!
[The bell rings at Elmore Junior High. In a mirror on her locker door, Penny checks her face. Darwin hides behind a corner, spying on her. She sees him in the mirror and turns around. Darwin quickly hides]
[She turns back to the mirror]
Darwin: [Whispering] I'm gonna dig some dirt on you, and expose you as the treacherous bro thief you are!
[Darwin stretches his eyes and navigates them around Penny. They watch her from above. Penny soon notices them]
Penny: Oh hi, Darwin.
[Darwin screams and runs off, bumping into Carmen. Pulling his eyes back to normal, he runs to the end of a hallway. Seeing no way out, he just stands in the corner]
Penny: Bye… Darwin?
[Later, Penny and Carmen enter the cheerleaders' dressing room, talking]
Penny: …made these funny faces at me through the window of the bus and-oh, hi Darwin.
[All the girls, sans Penny and Carmen, gasp at Darwin, who is up in the ceiling, holding onto two beams. He falls down, runs to an open locker, and applies makeup on his face in an attempt to disguise himself as a girl. Certain that it is not working, he grabs a bottle of powder from Carrie and throws it to the ground, where it explodes into a cloud. As the girls cough, he escapes]
Penny: [Coughing] Bye, Darwin.
[Even later, Sussie and Penny are sitting on a bench in the schoolyard. From behind a dumpster, Darwin uses a listening device to eavesdrop on Penny]
Penny: Here, Sussie. I know how much you love chicken skin, so I saved some from last night's dinner.
Sussie: SUSSIE LOVES CHICKEN SKIN!
[She grabs some and rubs it all over her head, screaming and laughing loudly. The noise makes Darwin shatter to pieces. Penny and Sussie notice him and walk over]
Penny: Hi, Darwin.
[The pieces of Darwin scream, sprout legs, and flee]
Penny: And...bye, Darwin.
[Penny yelps, startled]
[The bell rings. In class, Penny writes on a piece of paper. She grabs her bag to put a book in it. Opening it, she is alarmed to find Darwin inside, reading her diary]
Darwin: Hi, Penny. Nice, um...diary.
Penny: [Disturbed] Hey, how about you come to lunch with me and Gumball, seems like maybe you wanna talk, right? [Closes bag with him still inside] Right. [Walks off]
A Nice Lunch
[In the cafeteria, Gumball has arranged a table for Penny and himself. He takes out a small box, which inside holds a ring. He plans to propose to Penny, but is still deciding on how]
Gumball: [Laughs pretentiously] Uh, what was that? Yeah, I know. We got so much in common. [Proposes quickly and intensely] BE MY WIFE! Ugh, it's not special enough. [Tries proposing with the ring box on his tongue] Mawwy me. This won't work. [Takes the box off of his tongue and sighs] I just want it to be perfect.
[He starts imagining himself and Penny in a log cabin with fireflies, a bear skin rug, a fireplace, a chocolate fountain and R&B music playing. They're both having a good time, laughing]
Penny: This is perfect, Gumball.
Gumball: Not quite yet, sugar. But it will be...
[The space background appears and Gumball opens the box with the ring in it]
Gumball: ...When you say "yes."
Darwin: [Appearing similar to Penny] What?
[Gumball snaps out of his fantasy and yelps]
Gumball: What are you doing here?
Penny: I invited him. [Kisses Gumball]
Darwin: [Gasps and kisses Gumball back] I don't need an invite!
Gumball: Okay, loud.
[Gumball puts his arm around Penny. Darwin grabs Gumball's other arm, and puts it around himself. Awkwardly, they inch themselves toward the table]
Gumball: Sorry, I didn't know you were coming so there's only two plates. [Darwin grabs the plate of spaghetti that was intended for Gumball] Okay, can I use my hand at least? [Darwin hisses] Never mind.
Penny: So, uh, Darwin, I hope you don't feel… threatened by me, do you?
Darwin: [Laughs loudly and sarcastically] No.
Penny: Okay, good. Enjoy your food.
[They all begin eating. Gumball and Penny share a plate of spaghetti and begin eating the same strand. Romantic music is playing, and a kiss is imminent. The moment is cut short when it is revealed Darwin has started eating the middle of the strand, preventing the couple from kissing. They tug on the spaghetti strand trying to shake Darwin off, but it only causes all three of them to headbutt eachother. They all fall to the floor]
Gumball: Dude, what is wrong with you!?
Darwin: Nothing, I'm fine! See you later. [Walks off]
Gumball: Well, now that we're alo--
[Darwin rushes back to Gumball, and kisses him on the cheek, before rushing away again. After Darwin flees, the couple hold hands and move closer to each other]
Gumball: Now that we're alone, there's something I wanted to ask you.
Penny: What is it?
[Darwin walks back to the couple and wedges himself between them]
Darwin: Actually, I'm gonna stay.
[In the gym, Coach tries and fails to whistle with her fingers]
Coach: Okay, now pick your teams!
[Gumball and Tobias start picking, with Gumball choosing first. In the group of students, Darwin tries to get Gumball to pick him by blowing a vuvuzela and waving around two lit flares, all while jumping up and down. Gumball looks at Penny, and she gestures to Darwin. Gumball sighs, and chooses him]
Darwin: Who? Me? OH! In your face!
[He dances around Penny in a mocking manner. Finishing, he runs to Gumball's side. Gumball facepalms. The match begins, with Coach throwing the ball up, still unable to whistle. Gumball taps it towards Penny]
[Penny catches the ball, and is about to shoot when suddenly Darwin blocks her. In a montage, he repeatedly intercepts the ball from her, roaring. At one point he even knocks over a cup of water she is drinking. At the end of the match, he flexes his muscles and roars. Gumball, holding the hand of a hurt Penny, walks up to him]
Darwin: [Throws the ball at Gumball] Playing ball!
Gumball: She's on our team, man! You're out!
[He throws the ball back to Darwin. Darwin's head (and thus body) is replaced with the basketball]
Darwin: [Muffled] Fine! Suit yourself.
[Darwin runs off, and Penny sighs]
At the Library
[In the library, Gumball once again tries to propose to Penny. He emerges from behind a bookcase and walks up to her]
Gumball: Penny, there's something I need to ask you.
Penny: Actually, there's something I wanted to say as well.
Gumball: I know. I totally feel what you feel. Let's say it at the same time. One. Two-
Penny: We need some space. [Gumball gasps and makes a shocked face] It's just…until you guys work it out, I kinda feel bad ruining your relationship. You two have something special, you know.
[Gumball, still shocked, screams as he runs off - without moving his legs. He screams and glides his way through the hallway, onto the bus, and back through his house until he arrived in his bedroom and finds Darwin waiting there. He is poorly dressed up like Penny]
Gumball: Ugh. What are you doing?
Darwin: Whatever it takes for you to still love me. Is it working?
Gumball: If by working, you mean making me nauseous then- [Gags, then cries] But it doesn't matter anyway. Penny's left me! She didn't want to come between us, and it's all your fault! [Faceplants and sobs]
Darwin: Uh…I didn't mean to come between you two. I-I-I just wanted to spend more time with you. I'm so sorry. Come here-
[Darwin tries to reach out to Gumball, but Gumball avoids him]
Gumball: Wait, this is creepy. [Sobbing loudly] But I really need a hug!
[Darwin holds Gumball, and comforts him]
Darwin: There, there.
Gumball: Is it weird that I love her so much it makes my ears sweat?
Darwin: No, no.
Gumball: Is it weird that I think about her all the time, even in the bathroom?
Darwin: [Chuckles] No.
Gumball: Is it weird that I bought a ring and I want to ask her to marry me?
Gumball: Well, it doesn't matter now. It's all ruined!
Darwin: No, it's not. What if I could give you the perfect setting, the perfect moment?
Gumball: What do you mean?
[Darwin begins dancing and imitating R&B music]
Gumball: Stop it. That…that's weird.
Darwin: Mm mm. Come on.
Gumball: [Snickers] All right. [Joins in dancing with him] How are you gonna get a log cabin though? Or a lake? Or a chocolate fountain? And how are you gonna get her to come over?
Darwin: Come on. Mm mm. [He starts dancing towards the door] Uh huh. Come on.
The Perfect Date
[At the Fitzgerald household, Darwin repeatedly rings the doorbell, then runs off.]
Penny: I got it! [She opens the door and notices a trail of origami roses] Huh? Origami roses? [Picks up and examines one] Made out of toilet paper. [She follows the trail, which leads her through the streets, to the Watterson house, and then into the backyard to their shed] Gumball? Guys? Hello? [Leans down in front of a puddle of antifreeze in front of the shed, sniffing it] Are your parents aware there's a lake of antifreeze in their backyard? This stuff's really flammable, you know. [Sees a jar with flies that have firecrackers tied to them] Huh? [One fly is gesturing at the firecracker tied to it, inaudibly asking for help. Penny knocks on the shed door and opens it. Gumball is in there, with a sensual face, and a fan with colored paper tied to it blowong loudly, emulating a fireplace. He says something to her, but the fan drowns him out] What?!
[Gumball turns off the fan]
Gumball["Romantic" voice] A-please. Sit down.
Penny: [Giggles] Wow. Okay... Uh, why are you sitting on roadkill?
Gumball: [reading from a piece of paper] 'You have made me the happiest man in the world. Goodnight.'
Gumball: [Crumpling up the paper, whispering] Dagnabbit, that's supposed to be the last one. [Normally] Uh, hold on. [Produces another piece of paper from his pocket and reads from it] "Romantic deep male voice. [Speaks in the voice] Welcome to the best night of your life." [Squeaks. Penny suppresses her laughter] May I offer you a refreshment?
[He opens a bottle of soda, but it fizzes out of control. Gumball tries to stop it, all while still making the face, with some struggle. Eventually, the fizzing stops. He pours the remaining soda into a glass with the ring, and hands it to Penny]
[Outside, Darwin is chewing some chocolate, holding onto a hose. Upon recieving the order, he squeals, and quickly blows the chewed up chocolate through a hose. The chocolate comes out of a pipe inside the shed, spewing everywhere. Gumball takes some of the chewed up chocolate on a stick with a strawberry and offers it to Penny. Penny pushes it away]
Gumball: So Penny, there's something I've been meaning to ask you.
Penny: Uh, I'm listening.
[Gumball begins to read another piece of paper, one which holds the big question, but it is covered with chocolate]
Penny: [Grabs and throws away the card] Oh, look; stop with the cards, just talk to me.
Gumball: Okay. [Inhales] Will you mmmmm… will you mmmm… [Punches himself in the face, frustrated] Urgh! Will you mmm…
Darwin: [Outside] Come on man, just say it!
Gumball: [Nearly unintelligible] Will you marry me… [Mutters] mmmmm…
Darwin: Come on, COME ON!
[In impatience, he unintentionally breaks one of the jars containing the flies. The firecrackers on the flies ignite, and set fire to the origami roses as they fly around. Darwin tries blowing the fires out, but only adds fuel to them. He screams and peeks into the shed. After trying to get Gumball's attention, Gumball scowls at him, so Darwin simply grabs a shovel and closes the door. As Gumball continues struggling to propose, Penny drinks her soda and chokes on the ring, changing forms as she coughs. Gumball now has his eyes closed, and so is unaware that she is choking. Darwin continues fighting the fires, now trying to smother them by beating them with the shovel. A stray ember sets the puddle of antifreeze alight. Darwin barges into the shed only to be greeted by Penny in her Gorgon form. He calmly closes the door, but upon seeing a propane tank about to explode, rushes in. He pushes Gumball's mouth with his fins in an attempt to help him speak]
Gumball: Will you marry me?
[He then grabs Penny, who is still choking, and all three jump out of the window just before the gas tank explodes, destroying the shed. Upon landing, the ring is dislodged from Penny's throat]
Penny: [Coughs] What did you say back there?
Gumball: [Picks up the ring and beams, with flowers surrounding his face] Marry me!
Penny: Oh Gumball, I can't.
Penny: We're twelve years old.
Gumball: Age doesn't matter when it comes to love.
Penny: Legally, it kinda does. And I don't think Darwin's over it yet.
Darwin: [Scowls, then smiles, eye twitching] No, I'm perfectly fine with it. [Continues scowling]
Penny: Besides, we don't need a ring to show we love each other.
Gumball: What do we do with it, then?
Penny: I think I have an idea.
Penny: …and Gumball. Do you, in the name of the bro-code, bromise to always love and take care of your bro in sickness and in health, brosperity and broverty?
Gumball: I do. [Puts ring on Darwin's fin]
Penny: You may now high-five the bro.
Gumball and Darwin: [High five] Yeah!
[Penny kisses Darwin and Gumball on their cheeks, and they all laugh as fireworks light up the sky. We see that the fire has spread, by way of the trail of origami roses, and eventually we find it has reached the Fitzgerald's house. The episode ends with the Fitzgeralds watching their house burn as firefighters try to put it out]