After being cruelly rejected by his friends when they find out he is the son of Satan, Rin Okumura has a talk with Mephisto and decides to leave everyone he knows behind. Two years later, the students of the cram school run across him again, and are unsure about how to deal with the person he has become.

Bullied her whole life, Lilly Chasen has always been looked down upon. Always not good enough, always over looked. But that all changes when she 'dies' and gets recruited to what seems like an assassin school. But what happens when she has to go back to meet the people she once called family, and the people that left her for dead?