Asahi lives with her son Yuji, her husband had to go on a business trip for a long time. Koume is Yuji's classmate who often bullies him. One day, Koume saw Asahi with Yuji and was captivated by her beauty. When Koume came to visit Yuji, he confided in Asahi about his lack of a mother and his envy of Yuji. Sympathizing with Koume, Asahi agreed when he wanted to hug her. The next day, Koume visited again, Asahi invited him in and made tea for him. Koume behaved well and pitifully as he had no mother. He expressed his desire to hug Asahi again and she agreed. But this time, he not only hugged her but also touched and groped her body. Although Asahi resisted at first, her resistance weakened over time. Koume touched parts of Asahi that no man had touched in a long time, awakening her feminine instincts. She surrendered her body to Koume's continuous caresses. Her sexual desire was constantly aroused, and in the end, she forgot everything and indulged in wild sexual encounters with her son's classmate.