Kaori Yamamoto lost her virginity to her mother even though she had a girlfriend for the first time

Kaori Yamamoto is a young woman who has a girlfriend, but finds herself in a situation where she loses her virginity to her own mother. Her mother takes the lead in their intimate encounter, which involves explicit acts such as masturbation and intercourse. As they engage in these activities, it becomes clear that the central kink is the taboo nature of their relationship as mother and daughter.