In order to cheer Haruto up after his anime was such a flop, Itsuki gets him as well as Nayuta, Miyako and Chihiro together so they can play a TRPG. Itsuki usually plays girls in games, but for some reason, Chihiro makes out their character to be Itsuki’s character’s little sister, which leads to Nayuta and Miyako also making their characters sisters of the other two. Haruto becomes the GM and does whatever he wants.
There's no reason to go in, knowing 
we're just going to be sacrificed.
Wenn wir nur als Opfer dienen sollen,
brauchen wir da nicht rein.
No hay razón para entrar
sabiendo que somos sacrificios.
No hay razón para entrar
sabiendo que somos sacrificios.
Pas besoin d’entrer
si c’est pour être sacrifiées.
Non c'è motivo di entrare,
sapendo che vorrà sacrificarci.
Não tem porque entrar, sabendo
que seremos sacrificadas.
В особняк-то нам уж точно
лезть теперь незачем…