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.
For this game, I've arranged some samples 
of partially predetermined abilities,
Ich habe Beispielbögen mit ein
paar Fähigkeiten vorbereitet,
Para este juego, traje unos ejemplos
de habilidades para las clases,
Traje unos ejemplos
de habilidades para las clases,
J’ai préparé des fiches
avec des archétypes,
Per questa sessione ho preparato
degli esempi con abilità predeterminate,
Para esse jogo, eu preparei
alguns exemplos de personagens,
На первый раз я заранее
подготовил несколько шаблонов.