Shinichirou Nakagami was living the life that most lads in his school could only fantasize about: sharing a room with wayward student Hiromi Yuasa. Since her mother's death, however, the bright and cheery Hiromi has been melancholy and frigid at home. While he is the target of his peers' irrational envy, stories begin to circulate when Shinichirou meets Noe Isurugi, a girl infamous for cursing students, curses that always come true.