Tomoko (Nanami Hirose), a devoted wife who loves her husband, is a middleman ... Midsummer (Yumi Kazama), who has an affair with Tomoko's husband, is a guest ... Two people who meet at a hot spring inn [Nawaya]. Tomoko ironically sheds her back without knowing the nature of midsummer. In fact, it was a ruthless trap for Tomoko's husband to take a large amount of debt and repay it with Tomoko in the middle of summer. Then, when the terrifying secret of [Nawaya] was revealed, his life as a "Nawaya ●" to entertain the lord with devilish desires began ...