Tsuki no hikari

"Masahiko is estranged from his family and lives a dead end existence in Tokyo, working a shady job to pay the bills. When his sister dies under mysterious circumstances, he inherits an unlabeled CD from her possessions. As he listens to the avant-garde jazz music it contains, he is propelled into an out-of-body experience -- an experience he soon discovers that he can repeat whenever he wishes. Masahiko's investigation into her death and the source of the CD takes him to both the higher level of the astral plane and the lower depths of the Tokyo underworld." --v. 1 cover.