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.
It's basically an errand side quest.
so ein Boten-Quest also?
Básicamente, es una misión de recado.
Básicamente, es una misión de recado.
C’est une de ces quêtes
où on fait le coursier.
In pratica è una banale missione secondaria
 di consegna.
Basicamente é uma quest de
acompanhar alguma coisa.
Проще говоря,
внесюжетный квест.