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...
Honestly, his obsession with little 
sisters is a serious problem...
Mannomann, sein Imouto-Fetisch
bereitet mir Kopfzerbrechen …
Sinceramente, su obsesión
con las hermanitas es un problema…
Sinceramente, su obsesión
con las hermanitas es un problema…
Sérieux, sa passion des petites sœurs
est problématique.
Che cavolo... Questo suo feticismo
per le sorelle minori è davvero un problema...
Sério, essa obsessão dele com 
irmãs mais novas é um problema...
Ей-богу, ни конца, ни края у его мании на сестёр…