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...
The other players ask yes or no 
questions in regards to the mystery
Daraufhin dürfen die anderen Fragen stellen,
die er mit ja oder nein beantworten kann,
Los otros preguntan
para recibir "sí" o "no"
Los otros preguntan
para recibir "sí" o "no"
LA SOUPE ÉTAIT EMPOISONNÉE ?
Gli altri partecipanti fanno domande sul mistero,
a cui rispondere con "sì" o "no",
Em seguida, os outros jogadores 
fazem perguntas sobre o mistério
А игроки по очереди задают ему вопросы,
на которые можно ответить «да» или «нет»,