A story about a mother and son. For her married eldest son Yasuhiro, after renovating it into a two-family house, he will live with her wife Sarina. However, her husband, Tatsuo-san, has extended her nose to her Sarina-san, and she can't get her to deal with her. But thanks to that, I can spend time with her favorite Yasuhiro-chan... and her mother's excessive love for her son. While trying to respond to that, I noticed that she was more sensual and wonderful than her own wife, Sarina. Since then, it has become a daily routine to be buried in her mother's rich body.
