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...
or what his family's like, 
have anything to do with it?
oder sein Einkommen,
etwas mit dem Rätsel zu tun?
a un rapport avec l’affaire ?
o la sua situazione famigliare,
che abbia a che fare con la storia?
ou talvez algo com a família
 dele, tem a ver com isso?