Four friends who had known each other since college reunite after a long time, reminiscing about old memories. Among them, Sugaura, who recently returned to Japan from America after nine years, seems particularly troubled. The truth is, he has secretly harbored feelings for Satomi (Shiraki Yuko), who was always on his mind since their school days—but she's now married. Knowing full well that regret won't change anything, Sugaura eventually confesses his feelings to Satomi, unable to suppress his emotions any longer. The two give in, making love just like they did back in their youth. That passionate encounter leaves an unforgettable mark deep in his heart.