Otoko no Hanamichi

Tomoharu, the owner of a gay bar, accidentally helps Matsuo, an otaku who was mistaken for a shoplifter. Matsuo is deeply moved by Tomoharu’s manly outburst! Later, when Matsuo begs him to help him become more manly, Tomoharu agrees to date him while hiding his true identity as a flamboyant gay man...

(Source: Libre Shuppan, translated)

Note: The third installment in the Don't Worry Mama series.