So you’re saying the seme lied and hurt the uke, after the uke told him he was a sex worker he still decided to meet him on many occasions then continued the sex affair. He’s a consenting a adult who had various options to leave, he just now decided that he’s going to retaliate against something he clearly knew about? It’s not like he didn’t know the uke’s profession.
I mean, yeah, he hurt the uke's feelings with his lie. After the uke raped him in his sleep before telling him the next morning that he works in the sex industry even though they'd just met and hadn't talked about how the uke only does safe sex. He could've been the type to do it raw for all he knew. Hell, what if the seme preferred not to have sex with a sex worker? Anyways, the uke's hurt feelings were followed by the uke hurting the seme's feelings by comparing him to customers. Your adult argument can be applied to the uke as well, he didn't have to keep working as a sex worker when he saw that it was an issue to the seme. The uke is leading him on. The seme's behavior is bad, but so is the uke's. ╮( ̄▽ ̄)╭
Why should he leave the sex working industry for a guy who doesn’t date him or even confessed his feelings to him? In reality the seme IS like a customer because have you realized that all they do is have sex? The difference between the sex part the seme had no objections but the uke did. The uke owes him nothing, he’s stayed consistent the whole time. You can’t just decide to control someone because you like them, the seme fucked someone as well but he’s acting as though the uke betrayed him. It’s HIS JOB, that the seme was aware of. Instead of crying about it he should tell the uke he doesn’t like his profession then act on how the uke responds.

The uke seduced HIM before telling him he's a sex worker, raped HIM first when he passed out, they kept having sex with the seme growing feelings, they have that little jealousy argument where the uke basically tells him he's just like the customers when he makes the comparison saying he wears condoms with everyone and the seme, seme is hurt and decides to spite fuck the girl because he's been bitter for awhile now after having literally seen the marks left on the uke's body during sex with other men himself, then he sees the uke with another man right in front of him... the uke has been leading him on, he knew the seme was getting jealous too, because during the jealousy fight scene you see his face light up as he gets his hopes up before the seme lies and says he was just worried about STDs... anyways, this'll all clear up soon.