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.
Gagagia Kingdom: a small kingdom that 
lies on the ends of the continent.
Reino de Gagagia, un pequeño
reino al final del continente.
Reino de Gagagia, un pequeño
reino al final del continente.
Vous êtes au royaume de Gagagia,
petit pays en bordure du continent.
Gagagia: un piccolo regno
ai limiti estremi del continente.
O reino de Gagagia é um reino pequeno
que se situa nos confins de um continente.
На самой окраине континента
лежит королевство Гагагия.