Despite her gyaru looks, Aihara Yuzu is an innocent high school girl with no experience and no prior loves. When her mother remarries, she's transferred into the prestigious "Aihara Academy" for young ladies. However, on her first day at school she happens to witness the diligent student council president, Aihara Mei, making out with her hot homeroom teacher... Yuzu returns home, unable to hid how upset it left her, when her mother announces Mei will be her new step sister, and they'll be sharing a room...?!
School rules are for our social education, 
teaching us to obey designated rules.
Schulregeln dienen unserer
gesellschaftlichen Bildung
Las normas de la escuela
son parte de nuestra educación social.
Las normas de la escuela
son parte de nuestra educación social.
Le règlement du lycée nous apprend
les obligations de la vie en société.
È il regolamento scolastico
a governare sulla scuola,
As regras da escola são parte da nossa
educação social, nos ensinam a seguir regras.
Школьные правила — урок жизни в обществе,
который учит соблюдать дисциплину.