Ryuusei saves a demon girl and ends up dying so she shares half of her power with him and now he's basically a demon too. If they separate, he dies. If they don't find the one who summoned her within a year,...

Jang Yumi works at the home for lost children at a department store. Her job is to make them as comfortable as possible until their parents pick them up. But it seems that it is not always easy to take care ...