Shibaki is a high school student whose sole interest lies in girls. Nevertheless, he has earned the reputation of being the most perverted boy at his school, causing the girls to actively avoid him. Upon discovering a book in the library detailing how to summon witches, he attempts the ritual as a joke; surprisingly, the book functions, and a cute witch named Rurumo appears to grant him a wish. Shibaki assists Rurumo, and in return, she declines to take his soul. After some time passes, he reflects on his encounter with Rurumo and wishes to 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.