Mother Chisato and her son went on a hot spring trip together for the sake of their son, who was nervous about his upcoming entrance exam. - When Chisato arrived at the inn, which was a little deserted but had a nice atmosphere, she told her son that she would like to study before taking a bath, and her son nodded. - After a while, my son asked Chisato to do the usual thing. - Chisato looked like she couldn't help it, and told him to solve the problem because she was going to give him shite.She pulled down her son's pants, took his son's already large dick in her mouth, and started sucking it slowly. - When the son finishes solving the problem, he starts messing with Chisato as if he can't stand it anymore. - I, Moto Chisato, hug my son and give him a deep kiss. - The two of them reach the climax as they seek each other intensely and deeply. - Satisfied, the two went to the open-air bath. - While washing each other, they naturally caressed and sought each other out. - A man records the scene. - An employee of this inn. - He sensed that Chisato's mother and child were acting different from a normal parent and child, so they kept an eye on them. - The next day, an employee appeared in front of Chisato and showed her the video from yesterday, with a faint smile on her face.