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.
But the fact that we all worked 
so hard wasn't a waste.
Aber sich ins Zeug zu legen, ist nie vergebens.
Pero el hecho de que trabajara
tan duro no fue en balde.
Pero el hecho de que trabajara
tan duro no fue en balde.
Ma tutto il nostro duro lavoro
Mas o fato que todos nós nos
esforçamos não foi um desperdício.
Но мы все старались не зря.