Do or Diaper
Rigby, Muscle Man, Mordecai, Margaret and Starla arrive at the house after eating pizza. Rigby, Muscle Man and Starla spy on Margaret and Mordecai, hoping that they kiss but they awkwardly hug and Margaret leaves. Mordecai comes back inside and Muscle Man bets him that if he kisses Margaret by Friday, he will wear a diaper for a week and if he doesn't then Mordecai has to wear a diaper for a week. The next day at the coffee shop, Mordecai asks her if she wants to hang out but she says that she can't because she has her classes but they can on Friday. A montage of Saturday through to Thursday of Mordecai preparing is shown and he leaves to get Margaret. Muscle Man drives past and asks Rigby if he wants to follow them. Rigby agrees and they drive after him. After picking up Margaret, Mordecai takes her to the movies and they both agree on watching "Buck Tooth Bob Goes To Europe". They later go to the Park and Margaret waits outside while Mordecai continuously puts mints in his mouth, making his breath extremely cold. Muscle Man and Rigby hide in the car while Mordecai goes outside. His breath becomes freezing and freezes the water and trees and more things and Margaret finds out about the bet. Margaret runs away but Mordecai follows. He eventually has the nerve to tell her how he feels about her and Margaret gets ready to kiss Mordecai. Mordecai does the same but Margaret dodges his mouth and whispers in Mordecai's ear saying "Have a good week, Diaper Boy.". The next day, Mordecai mows the lawn with the diaper and Muscle Man laughs continuously and records it on his phone. He then asks why he's smiling and he answers by saying that Margaret had a good time and that he still might have a chance to kiss her. Muscle Man and Rigby look at him and Muscle Man bets Rigby that he won't do it and Rigby agrees to the bet.
Characters
Main
Mordecai
Margaret
Rigby
Muscle Man
Minor
Starla
Mordecai
Margaret
Rigby
Muscle Man
Minor
Starla
Margaret and Mordecai about to hug R,MM&S looking at Mordecai hug Margaret Mordecai and Margaret think about a movie