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.
You're all adventurers who have arrived 
in an unexplored country.
Ihr seid Abenteurer in
einem abgelegenen Land.
Son aventureros
que van a explorar un país inexplorado.
Sois aventureros explorando
un país inexplorado.
Vous êtes des aventuriers
d’un pays frontalier.
Siete degli avventurieri
appena giunti in una terra inesplorata.
Vocês são aventureiros que
chegaram num país desconhecido.
Вы — авантюристы,
прибывшие в окраинное королевство.