The Devil Does Exist, Volume 1 - Mitsuba Takanashi What do you do when the boy who likes to torture you by stealing your love letter to another guy and coming up with ways for you to spend time together at school. Finally, you may even consider liking him...AND THEN... ends up becoming your new step-brother?! Kayano battles with a new found love for her "step" brother...and how it effects them through the years...