One morning Gumball wakes up, and decides to cover himself in ice cubes. He tries to glide down the stairs with Darwin, but they fail and land right in front of Anais naked. Anais tells Gumball that he cannot go to school naked, so he tries to find his clothes. Gumball soon finds Richard asleep in the garden. Richard tells Gumball that he was doing the laundry when Nicole told him not to do so. Gumball's clothes have shrunk and they no longer fit him, forcing Gumball to wear Nicole's wedding dress to school. When Gumball's class sees him outside, they don't recognize him, so he makes up a fake name "GumballOopsEggWobbleUnderpants" and country of origin "GumbaldNoWigBattleAxeNinja" based on what he sees outside. They all believe him and head off to school.
When they get to class, Miss Simian falls for the act as well. Gumball is confused. When they all leave class, there is a puddle in the hallway and everyone is offering Gumball a way across as an act of love, but he decides to walk around it to avoid any complications. Still confused, he asks Anais what is going on, and she tells Gumball that anyone will do anything for a beautiful girl, which the students believe he is. Gumball realizes this, and abuses the power in a montage. Darwin is shown to fall in love with Gumball, not knowing it is his brother. Gumball receives a love letter from Darwin, requesting him to meet him on the Stomach Destroyer roller coaster after school. Anais informs Gumball that it is a love letter, but he is ignorant and believes Darwin just wants to hang out with him in a platonic way. He goes on the coaster with Darwin, where Darwin tells Gumball (as a girl) that he loves "her" and tries to kiss her. Gumball comes home terrified, and has a thought of what would happen if Darwin didn't move on and married him. Anais tells him that he simply has to tell Darwin the truth but Gumball refuses to do so, knowing that his brother would be heartbroken. So they come up with a scheme to stop Darwin from loving Gumball and start moving on.
They stage a good bye act for the "Darling of Elmore High" with a bus. When Darwin comes, Gumball hides in the bus and proceeds to attach the dress to a balloon with his face poorly drawn on it. He jumps out of a window on the bus while naked, but the balloon does not go into the bus. Instead, it flies toward the sun and pops. This leaves Darwin devastated. Gumball goes and cheers Darwin up. Just when he feels better, Darwin immediately falls in love with a fire hydrant that the dress landed on. Gumball remarks that some people can't help but make fools of themselves, just as everyone laughs at Gumball for being naked. He walks away, humiliated.