Isso é Nabari No Ou .
Um dos personagens principais, Yoite , expressou um desejo sincero de não apenas morrer, mas também de ser apagado existia.
When Yoite turned fourteen, his family decided to kill him, slashing his throat and unsuccessfully attempting to force Tsukasa to do the same. After this desperate attempt of ending his life, being erased from existence became his goal. He ran from the house and was saved by Hattori, who accepted him into the Grey Wolves. Yoite spends a year studying the Kira technique and all required ninja skills. Hattori promises this would bring him closer to his goal of being erased. His desire to disappear comes from his painful past and his fear of death. By disappearing he wouldn't have experienced so much pain nor death. Yoite is then placed under Yukimi's care and is given the name "Yoite".
