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...
I-Impossible... How could you get it 
right without asking a single question?
Das gibt’s nicht!
Imposible…
¿Cómo lo adivinaron sin preguntar?
Imposible…
¿Cómo lo adivinasteis sin preguntar?
Impossible !
Impossibile... Come avete potuto indovinare
senza farmi neanche una domanda?
I-Impossível... Como vocês acertaram
 sem fazer ao menos uma pergunta?
Невероятно!