Mother's friend Hikari Mitsui

The movie explores the complex relationship between Xiaoguang and his mother's friend, Hikari Mitsui, who is also married. As they spend time together, they develop a deep emotional connection, which eventually leads to intimate moments. The story delves into the themes of desire, loneliness, and the consequences of one's actions, all set against the backdrop of a chance encounter between old acquaintances.