Dull & Sweet

Naoto Sewa works at a marketing company during the day and at a gay bar at night. During a gay matching party at the bar, Nibu Kazuma, who's straight, mistakes it for a marriage matching party... Sewa saves Nibu from some unwanted attention and sends the man on his way. However, unexpectedly the next day, they meet again at the marketing company where they turn out to be colleagues. While spending time together as colleagues, Sewa can't help but be attracted to Nibu's kindness and sincerity. But Sewa swore that he would never fall in love with a straight man again!

(Source: Libre, translated)