Chae-a Han and Yunsu Park may be perfect angels at church, but Chae-a is really a foul-mouthed ex-convict, and Yunsu is...a vampire? When Yunsu blackmails Chae-a with a murder she didn’t commit, she begins...

Shinji Kanou is madly in love with his older married neighbour, Yumi Mishima. One day Yumi suddenly comes onto Shinji leaving him confused. The next day, he meets Yumi with her single twin sister, Nami.