Her husband Sejin is not interested in his wife Ahae as a woman. Ahae's husband is just heartless. In fact, Sejin is having an affair with Ara's young and beautiful younger brother Ara. After having suffered from depression due to work poisoning, he receives a message from the alumni association, and he changes his mind and attends. There, she meets Ahae, the next-door sister who had a crush on her childhood, and is still fantastic with her pretty appearance. Lonely Aha due to the innocence of h...