Itsuki Hashima is a popular, young novelist. However, he is obsessed with little sisters and his works seem to always include little sisters, so there’s some difficulty coming up with a new series. One day, his younger step-brother Chihiro and his colleagues, Hayato Fuwa, Nayuta Kani, and fellow college student, Miyako Shirakawa show up at his apartment. They enjoy dinner, drinks, and a game. That night, Nayuta makes advances towards Itsuki, but...
is normal in households 
with little sisters, right?
sicher ganz normal, oder?
es normal en casas con hermanas, ¿no?
en casas con hermanas, ¿no?
ça, c’est normal
quand on a une sœur.
è perfettamente normale
se ci abiti insieme, no?
é normal em casas com
 irmãs mais novas, não?
обычное дело для семей, где она есть?