The Bakusquad—Katsuki, Eijirou, Hanta, Mina, Denki—are dating Y/n. They have been since second year. They’re in an open relationship, aren’t jealous of each other. They call Y/n their girlfriend. Everyone knows the group are all dating her. The group share Y/n—they like seeing her with their other partners, but are slightly possessive/protective with anyone else. So when there’s a new student, and Y/n gets assigned to be their welcome buddy, the squad don’t like it. Especially when the new student tries to get closer to Y/n, and discreetly replace them. The new student likes Y/n—Y/n doesn’t know but the others do. The new student acts friendly, energetic and happy but Katsuki’s the first to see through it. They slowly manipulate Y/n by making the her partners seem more paranoid and possessive. The new student likes Y/n’s personality—THEY’RE NOT OBSESSED WITH HER QUIRK. The student wins against the squad. Now the squad has to win her back.