Haruto Michiro, an 18- year old senior at Majime High School, lives an ordinary life with his mother and two sisters. He is antisocial and is often seen as a dull copy of his popular twin sister. Aiko Shirase, the heiress of the Shirase Real estate corporation, is the wealthiest and most humble girl at Majime High. After being rejected by Aiko, Haruto has a strange encounter late that night, and it would change his high school life forever.