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.
I feel like playing a TRPG, 
so you be the master.
Wenn du Bock auf ’ne Runde D&D hast,
machst du aber den Meister.
Me apetece jugar a un TRPG,
haz de master.
Me apetece jugar a un TRPG,
haz de master.
On se fait un jeu de rôles ?
Tu feras le maître de jeu.
M'è venuta voglia di giocare
a un TRPG, lo fai tu il master?
Quero jogar um RPG de mesa,
então seja você o mestre.
Мне тут в настолки поиграть приспичило,
будешь мастером.