柊 真生

Having lost a bet with her older sister, Michiru, Maho Yoshikawa was forced to attend a school semester as a guy, and thus Mao Hiiragi was born. A very frail and girlish boy by appearance, Mao is actually very stubborn and manipulative. At first he(she) is hostile and critical toward Haruki, Mao eventually becomes a close friend of Haruki's and helps him out on several occasions.

He is a real person and guy (not just an alias of Maho) only in the Japanese versions.
Maho's younger brother. He is often quiet and seems fragile.
His heart has been bad since birth, so he doesn't go to school and stays home most of the time.
Since he has no school records, Maho is able to use his name to enroll in school after she lost a bet with her older sister, Michiru.
He is capturable, and has his own route and H scene.
His character is written out of the English version "Day Of Love."