Kyouichi's indecisive character has led him to repeatedly commit the foolish mistake of adultery. One day, Imagase, a college classmate he hasn't seen since graduation, shows up as the private detective hired by his wife to investigate his infidelity. Imagase, however, proposes a deal. He won't tell Kyouichi's wife about his affairs, but, for compensation, he makes an unbelievable demand: "I want your body in exchange..."

Kyoichi est désormais un homme divorcé, mais la relation qu'il a nouée avec Imagasé est toujours aussi ambiguë. Au fil des jours, il se laisse entraîner par son ami et partage son intimité, mais l'apparition de Tamaki. Une jeune fille attirée par Kyoichi, jette la confusion dans cette relation encore vacillante...