In a quiet suburb of South Korea, the life of a university student named Sung-joon takes an unexpected turn when he embarks on a strange and forbidden romance with the mother of his best friend, the attractive and enigmatic Madam Kim. He, a somewhat introverted student and a bit lost in life, finds in her not only a maternal figure but also a source of passion and desire he never knew he was seeking. For her part, Madam Kim, trapped in a daily routine and feeling neglected by her husband, is drawn to Sung-joon's freshness and youthful energy, challenging social norms and her own morality.
As the relationship intensifies, both are confronted with a whirlwind of emotions that leads them to explore their limits: how far are they willing to go for love, desire, or simply the need to escape their monotonous lives? Their secret binds them, but it also endangers not only their bond but also the friendship between Sung-joon and his friend, who becomes increasingly invested in the quest for the truth. The conflict of interests and the emotional tension culminate in an unexpected outcome, where each character must make decisions that will change their lives forever. With intriguing twists and a narrative filled with sensuality, the story reminds us that sometimes love overwhelms the senses and transcends the boundaries of what is permissible.