Office worker Natsumi is living with Shinya, who desires her from morning till night... but Shinya cheats on her with her best friend Mirai while drunk. She forgives him once and they reconcile, but then Kiyoshi, a newspaper delivery man, comes to tell her that Shinya has cheated again. Suspicious of the sudden news, Natsumi learns that Shinya is engaged to her boss's daughter. Kiyoshi is what society would call a stalker, but he has a pure heart and wishes for Natsumi's happiness. His feelings begin to waver in Natsumi's heart.