Yuichi suffers from his unforgivable love for his mother-in-law Saya. Saya, who sensed her son's feelings, allowed him to peek at her masturbating behavior, saying, "If it's up to this point...". However, young Yuichi cannot stand it alone, and he attacks Saya. However, at the same time, his father, who was at home, suddenly began to suffer and died. After 49 days, Yuichi continues his relationship with Saya while feeling guilty about his late father, but an unexpected person calls out to him.
