Banri Tada is a freshman at a Tokyo law school. After an accident, he suffers severe memory loss. Despite the incident, he befriends fellow freshman, Mitsuo Yanagisawa, which leads him to the beautiful, yet obsessive, Kouko Kaga.

Takamiya Honoka is a regular student whose only problem seems to be that he sits next to Kagari Ayaka, the school's #1 beauty. They have never spoken to each other before and any small interaction between them immediately results in her fanclub beating him. Yet when a falling part of the school's building is about to send him to the afterlife, it's Kagari that comes to his rescue. Only... she's dressed as a witch, carrying him in her arms and floating on a broom?! Kagari tells him it is her mission to protect him and that now she can finally protect him openly rather than undercover.

Shibaki is a high school boy only interested in girls. However, he has been branded as the most perverted boy at school, and the girls go out of their way to avoid him. When he finds a book in the library about how to summon witches, he tries it as a joke; unexpectedly, though, the book works, and a cute witch named Rurumo appears to grant him a wish. Shibaki helps Rurumo and she in return refuses to take his soul. After some time, he thinks about his meeting with Rurumo, and wishes he could see her again. His wish is granted immediately, as Rurumo falls from the sky and crash-lands in front of him, tasked with getting him to use up 666 magic tickets that grant wishes before she can become a witch again. However, according to Rurumo's familiar, what she does not know is that each ticket he uses will shorten his life span, and, when the last ticket is used, he will die.