an AU where daisuke and haru are tired of the police shit so they become traitors/mafiasos and adopt a child and that child is kokichi and kokichi goes undercover as deku in school and atsushi is the headmaster with dazai being his assistant
also kageyama is kokichis sibling

So basicially a
FKBU x Danganronpa x BSD x BNHA x Haikyuu!!

99% of this makes no sense <3