While her husband is away on a business trip overseas, Takami has been frequently meeting her lover, Kosuke, indulging in an affair to ease her loneliness. One day, her son's best friend, Yuuji, suddenly shows up at her house. Flustered, she tries to cover things up with lies, but ends up receiving an unexpected confession from Yuuji, leading them into an unintended intimate relationship. Despite his status as her son's friend, her feelings for him continue to deepen.