Reborn as a sin for our promise... (Ongoing)

In this world some of people believes in that, If one dies with an unbearable pain, they become the helpers of the ones which takes away lifes. The God of Deaths. Years ago, an accident happened in a normal street. A young boy called Takumi loose his life in able to save his childhood friend, Misaki. Misaki had problems with her leg and without his dearest friend's strength with her she quit being happy Takumi used to promise her to watch her back anytime... This shock make her loose her memories about that nightmare day, But also his dearest friend. So, about that "helper" thing. Was that true?..