Norio, her stepson, is introverted and has always struggled to communicate properly with Natsumi. Worried about him—and perhaps driven by her own desire to see her—Norio's friends begin visiting the Kurosawa household frequently. Amid these visits, the still sexually vibrant Natsumi finds her body reacting sensitively, unintentionally provoking misunderstandings. As if aware of this, Norio himself starts developing a growing interest in Natsumi's body. As their complicated relationship gradually intensifies, what kind of encounter awaits them?