Namida no Oto

Rokuro is a company man who excels at his job. Currently dating his boss's daughter, he seems to have a bright, stable future ahead of him. However, in reality, his heart's been closed off ever since his college relationship fell apart because of one mistake. As his mind is plagued with worry, wondering if he'll let his past relationship control his entire life, he spots Rui, his ex from across the street one day. Against his better judgment, Rokuro begins walking by that street daily, just to get a glance at his past lover.

(Source: Hakusensha)