A yuri manga series by the mangaka Saburouta and published in Comic Yuri Hime.
The series revolves around Aihara Yuzu, a trendy first year in high school who hangs out with her friends, attends mixers, and talks about boys. She ends up transferring to a very strict and prestigious all girl's school after her mother remarries and they move. At the new school, she finds herself at odds with the school rules and the student council president Aihara Mei. After returning home she is caught off guard when Mei shows up at her home. As it turns out, Mei is her new younger step sister and they'll now be living together as a family.
