Summary: Miu Sakurai attends a missionary school and has a crush on Shion Amamiya. In an attempt to increase her luck, she buys an old book of magic. Unknown to her, it's black magic and she summons Satan himself. Realizing she's a virgin, Satan decides he'll help her win Amamiya, but he'll take Miu for himself after it's fulfilled! This manga contains mature content and is recommended for mature readers.