Momoko, a mother who knows that her son Yosuke has finished her first experience, can't help but be worried about the other person. I'm secretly talking to her son's best friend, Yuya ... Yuya, who had a crush on her Momoko, tells her that she is a virgin and spits out her feelings for her. Momoko writes down "if it's about once", but she becomes captivated by Yuya's sincere feelings and intense pistons. Momoko gets wet with her joy when she violently interacts with a young man, and her pleasure is unforgettable ...