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...
She's my little sister who 
turns fourteen this year.
Meine kleine Schwester,
die dieses Jahr 14 wird.
Es mi hermana pequeña,
cumple 14 años este año.
Es mi hermana pequeña,
cumple 14 años este año.
Elle va avoir 14 ans.
C’est ma petite sœur.
È mia sorella minore
 e quest'anno compirà quattordici anni.
Ela é a minha irmã mais nova,
 que vai fazer 14 anos esse ano.
В этом году ей исполнится четырнадцать лет.