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.
What could be dangerous 
about such a pretty lake?
An so einem malerischen See
droht garantiert keine Gefahr.
¿Qué peligro puede haber
en un lindo lago?
¿Qué peligro puede haber
en un bonito lago?
Un lac aussi joli
ne peut pas être dangereux !
Che pericoli potrebbero mai nascondersi
in un lago così bello?
O que poderia ter de
perigoso num lago desses?
Что плохого может случиться
на таком чудесном водоёме?