During their first night sharing a room, Yuzu had her first kiss stolen by her step sister. Since then she can't get Mei off her mind, while Mei herself goes on as if nothing happened. Meanwhile, Mei's Grandfather, the chairman of Aihara Academy, takes Mei back to his mansion. Unable to forget the sad expression on Mei's face when they kissed, Yuzu heads to the mansion to confirm Mei's true feelings, but...?!
We're family, so no need to hold back.
Wir sind eine Familie,
also keine falsche Zurückhaltung.
Somos familia, no tienes que contenerte.
Somos familia, no seas tímida.
Après tout,
on est une famille, maintenant.
Dopotutto siamo una famiglia, 
non devi fare complimenti.
Somos família, não precisa se inibir.
Мы семья, так что не стесняйся.