A few years after marrying her husband Toru, Yuko, who still cannot get close to her son-in-law Manabu, decides to take advantage of Toru's summer vacation this year to return to her hometown. However, for Yuko, who was used to life in the city, living in a single wooden house without air conditioning was unimaginably hot. The obscene sweat that colored his entire body made Manabe lose his mind, and he began to think of Yuko as something more than just a a mother who is a woman
