Hitomi Hiiragi is an office worker still yearning for her ex-boyfriend, Yutaka Enokida, who shared many of her firsts. She regrets ending their relationship six years ago, driven by insecurities and a lack of communication as they struggled with the challenges of a long-distance romance. To Hitomi's surprise, Enokida reappears at her office one day after returning from an overseas assignment. It turns out they have both been working at the same company for three years, but their paths have never crossed until now. As the two meet up more often, her efforts to move on are futile, and old feelings seem to rekindle for the both of them. [Written by MAL Rewrite]