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 they're an heir to 
some ancient martial art
Oder er als Nachkomme einer uralten
Kampfschule das Talent dazu geerbt hat.
o es un artista marcial
que resulta que heredó sus habilidades.
o el prota que hereda las habilidades
de combate del padre.
ou l’héritier d’un art ancien,
et le héros lui succède…
o a quelli che sono eredi
di antiche arti marziali
ou sucessor de uma arte marcial
e acaba herdando isso...
Или же наследник древних боевых искусств,
а у протагониста талант!