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...
Well then, Senpai, let's kill 
some time by making out.
Wie wär’s, Senpai, wollen wir die Zeit bis
dahin mit Rummachen totschlagen?
Bueno, matemos el tiempo coqueteando.
Bueno, matemos el tiempo tonteando.
Beh, senpai, ammazziamo un po'
il tempo flirtando tra di noi!
Certo, Senpai, vamos passar
 o tempo nos pegando.
Ицуки, давай тогда поласкаемся,
чтобы время убить!