In the beggining, she was just an ordinary, average highschool girl; typical sophomore who had many friendly friends and loving parents. However, after one, life-changing incident. the person who used to be the bright figure in her eyes now has gone. she got bullied, avoided, and scared of by everyone. since then, she was branded 'Daughter of Murderer'. she found slight ray of hope, her upperclassmen friends promise her to do something in order to help her..

meanwhile, in the other world, just over the sky, distant from the girl's life, an angel of the death struggles to repent for a moral sin. He got expelled from his world, and the angel must meet that girl on the earth to do his mission, and that mssion must be completed within 57 days..