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...
so all of the staff had passed 
out from CO2 poisoning.
Das gesamte Personal kollabierte im Zuge der Kohlenmonoxidvergiftung.
y los que estaban allí
se desmayaron por inhalar CO2.
y los que estaban allí
se desmayaron por inhalar CO2.
Les employés s’évanouissent,
intoxiqués par le gaz.
così tutto lo staff è svenuto
per avvelenamento da anidride carbonica.
e daí a equipe editorial desmaiou
 por intoxicação com gás CO2.
Люди, находившиеся внутри,
отравились и попадали в обмороки.