Erotic Japanese musical drama in which a woman on the verge of marriage encounters the lost spirit of a teenage lover. Asuka Kawaguchi (Sawa Masaki) lives a mundane, if socially successful, life. She works in a fish factory and is about to be married to her boss, Hajime Taki (Mutsuo Yoshioka). However, one day at the lake Asuka comes across a kappa - a spirit from Japanese folklore. Asuka becomes aware that the creature is a reincarnation of her teenage love, Tetsuya Aoki (Yoshiro Umezawa), who drowned years ago. Suddenly Asuka finds herself facing a stark choice: to explore a teenage passion or settle for life as a married woman.