Mother's best friend Mio Kimijima - Kimishima Mio

The movie revolves around the encounter between Mio Kimijima, the mother's best friend, and A Gao, presumably the son, as they engage in intimate activities while the mother is away. Their relationship develops into a secretive affair, exploring themes of desire, intimacy, and secrecy. The central dramatic tension arises from the clandestine nature of their interactions, heightened by the presence of the mother who remains unaware of their actions.