A single mother's daughter becomes close to a middle-aged man she met through part-time work. When the mother discovers their relationship, she visits his home, only to find an unexpected person—her daughter's first love. The two middle-aged individuals, both already without partners, rekindle romantic feelings as they reminisce about their student days. Stimulating each other emotionally, their hearts race as events unfold intensely. Amidst swirling emotions, a new romance begins to blossom.