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...
a magnificent problem for you to solve!
und ein geniales Rätselbeispiel
aus dem Ärmel schütteln!
¡les daré un gran problema a resolver!
¡os daré un gran problema a resolver!
un magnifico enigma da risolvere!
um problema magnífico
 para vocês resolverem!
Я вам покажу, какие загадки надо задавать!