Kenta Arai is well on the path to become a social elite - prestigious diploma, promising job at a national bank. But a freak incident leads him...

In order to get to a lost gem, a bastard son of a wealthy family is forced to kidnap the company president.

One day, drawn to a mysterious song coming from the next-door apartment unit, Shunsuke meets Setsu, an old woman who claims she has been waiting...