Yuamu has been making everyone in UTS to eat the same meal for weeks to collect stickers and exchange them for the plates of a store's promotion. Upon collecting all of the stickers, she immediately goes to the store to collect the last plate, but she finds out the manager accidentally broke all of the plates. Yuamu keeps pushing the manager to get her a new one, but he refuses it every time. As a last resort, Yuamu challenges the manager to a duel where, if he loses, he has to get her a new plate. He accepts it.