Aimi lives with her older brother, Seiji, after losing her parents one after another. At the delivery destination of her florist, who started working because she couldn't keep being spoiled by her brother, she sees a woman who seems to be Hitomi, a teacher at her alma mater who suddenly disappeared and her whereabouts are unknown. Among the men surrounding Hitomi in the dubious bar, there is a familiar face... It is unmistakably her brother's boss, Manami consults her childhood friend and detective Shuhei.
