A pawn shop owner in Osaka is murdered, but due to a lack of conclusive evidence the police lists the man's death as a suicide. Detective Sasagaki, who investigated the case, can't forget the dark eyes of the main suspect's daughter Yukiho and the pawn shop owner's son Ryouji. As time goes by, more mysterious deaths surround Yukiho & Ryouji. Detective Sasagaki still unable to let go of the pawn shop owner case discovers startling details about Yukiho and Ryouji ...

High school student Mariko sings in the choir at the all-girls school she attends, and her biggest dream right now is to go to a music college. One day on her way home from school, she accidentally drops her bookbag into the sea. A man jumps into the water and recovers the bag for her, but all of her score sheets have been ruined. From that day on, Mariko’s new acquaintance becomes her bodyguard, walking her home everyday. But for some reason, he refuses to tell her his name.