Hope's manga / #Omegaverse(135)

The two of them work in the same company; the uke (o) found the seme (b) in a lounge (at the company), he was having his first heat and they had sex. They started going out and really liked each other (they never said love /either way they show strong emotions for one another/ but it's really cool of them to be perceiving of how long they've been together and how appropriate smth is). The uke met seme's friend (o) who then revealed to the seme that the uke isn't an omega, which the seme was already aware of. The uke is outed at the company in front of the seme so they couldn't avoid confrontation. They remain together because they really really like each other and they're very cute and erotic, it's awesome.