Hitomi becomes anxious that her already bland sex life with her husband, Hiroki's brother, will end when his sudden appearance. Then, one month after Souji comes to stay with her, Hitomi hears about his childhood memories of catching insects. Her husband is satisfied just by catching them, and her brother loves catching and taking care of them... Souji suddenly attacks Hitomi, and she tries to escape, but his rough, greedy caresses make her body, in the prime of her life, lose all strength...