Warui Otoko ni wa Ura ga Aru

When I look back, all I see are scum. Mitsunari, who boasts of his elegant looks and a demanding work ethic that everyone recognizes, but who also boasts a history of such a lousy relationship with men, ends up going out with Suwa, a coworker who is right in the middle of the pack in terms of looks, on a trial basis. He has a raised eyebrow, drooping eyes, thick lips, a running bridge of the nose, and a sweet atmosphere... and above all, a long collar that stimulates his pent-up first love. He is a playful man who easily accepts Mitsunari's confession, but the gap between what he looks like and what's inside is too big! Source: MU