Aimi who lost her parents one after another and lives with her brother Seiji. At the delivery destination of a flower shop where I started working because I couldn't keep up with my brother, I saw a woman who seemed to be Hitomi, a teacher at her alma mater who suddenly disappeared and lost her whereabouts. A familiar face is among the men surrounding Hitomi in the dubious bar. It is unquestionably my brother's boss, Aimi, who is a childhood friend and consults with detective Shuhei.