Returning from shopping, Yukie Aono finds the bag strap broken and struggles until Ken, a passing college student, helps her. Though strangers, they feel an instant, deep attraction, leading them to naturally become intimate—a mature woman and a young man in love, despite society mocking their age-gap relationship. One day, Ken accompanies Yukie to her apartment and discovers a man's shoes at the entrance, leaving him confused. Yukie urges him to go home, but those words unexpectedly trigger a new turn of events.