NDRA-113 - I am having an affair with her mother in secret... Tomoda Sayuka

Hiroshi visited his girlfriend's house after dating for six months and there, he met his beautiful, kind, and hardworking 'stepmother' for the first time, who had remarried while her father was on an overseas business trip. He heard that it was also her mother's birthday, and Hiroshi was invited to join her and her mother for a birthday celebration that night. In fact, the gift his girlfriend gave to her mother was imported women's lingerie, and he happened to witness her mother trying it on that night...!