My mother was a friend in front of my friend's eyes, and I succeeded in losing the virginity. Sayuri Kobayashi

Yoshiyuki, who confessed to her best friend Mitsuo's mother Sayuri, adored Sayuri in order to teach her the body of a woman, and she was scolded and provoked. Yosiyuki runs away from embarrassment. Later, when I went to my best friend's house despite being awkward, I stole the conversation between Mitsuo and Sayuri and listened. When Yoshiyuki saw the two laughing at each other, he thought they were betrayed, so he left himself to anger and killed his mother in front of his best friend's son, and lost his virginity.