Not gonna use names here cos I forgot, so I will be using the terms uke, seme, and omega to distinguish them cos I'm old and tired. I would also like to note that I don't understand korean so I had to rely on google translate and other translation apps. LOOOOONG SPOILERS below.
The uke liked the omega for the fact that he is an omega and he also liked his personality. The omega and uke went for drinks after this. The omega has a higher alcohol tolerance and made uke drink til the uke can answer what his relationship was with the seme. Just before uke passed out, he let out that they were sex partners.
Since then, the omega liked uke back (BECAUSE he thought the uke was the top in the relationship and for him it's rlly attractive for an alpha topping another alpha).
I believe the uke and seme has been keeping up with their sexual relationship even while uke was pursuing the omega. Uke also found out that seme did not realized that the omega manager was an omega.
The student the seme was tutoring found out about the uke and seme's relationship because she overheard them fighting at the bus. I think their fight was basically about the seme asking the uke what's wrong with an alpha being another man/alpha(?) Basically everyone in the bus heard them including the student. I believe the uke got pissed with the seme during the bus scene.
I don't really understood some parts in the manhwa but the student was in the shop and felt like something was gonna happen between uke and the omega so she texted the seme to go back to the shop or something before she left.
The omega has been giving hints to uke that he likes him back but the uke is not moving as fast as he would like, so during closing the omega LET OUT HIS PHEROMONES to basically seduce him and have sex with him.
The omega pheromones were working and the uke was about the jump on the omega when the seme arrived. And the uke asked seme to let out his pheromones so he can get out of whatever trance he's in bcos of the omega pheromones (the seme was unaffected btw). So uke and seme were able to get out of there. Mind you, before this, the uke wanted to ask the omega out. He even prepared a ring???? (Idk bruh his feelings weren't big enough for a ring)
And here is where the dubcon happened. The uke and seme were at an alley. The uke was calming himself down from the pheromones. I believe that's when the seme got confirmation that the manager was an omega. And the seme is like why are you obsessed with omega yada yada. And how uke likes to bottom anyway, so he won't be satisfied with an omega? The seme basically forced uke to have sex with him there. The seme held down uke's face and had sex w/ him (uke got bruises in his face).
The omega was able to listen in on the conversation and that's how he found out that the uke is the uke/bottom and not the top. And he was horrified? Disgusted? Basically the omega doesn't like the uke after that.
After that incident, the uke and seme were basically in a fight. The uke's part-time was finished cos he was going back to school (he only did it for summer) and still tried to pursue the omega. And that's when the omega told him that he knew that they were sex partners and he knew that he was the bottom, and that he shouldn't pursue him further and he shouldn't pursue any other omega if he likes bottoming, cos it wouldn't be fair to omegas??? Idk. But he was saying this w/ a horrified look on his face.
Uke went back to school. He couldn't find the seme. I believe they don't have classes together. Uke were looking/waiting for seme in school for like a month in school but they didn't see each other.
Since uke and seme were not having sex anymore, uke was not feeling the "afterglow" after their sex which is them being energized and getting rid of body pains. Anyway, he was still doing extreme sports and got into an accident. He broke/sprained(?) his ankle. Seme visited him in the hospital. Just wanted to make sure uke was okay. Was about to leave when uke stopped him.
Uke asked him why seme liked him. And I think seme didn't truly realize his feelings or were in denial of it until recently but he admitted that he thinks seme liked him from way back. He doesn't care about omega and that stuff because he only cared about uke. That's why he doesn't like omegas because he can see how uke is so interested about them. During highschool, when uke decided which college to go to, seme have never imagined them being a part. It was like it was natural for him for them to be together. So he really tripled down on studying (to the point of getting nosebleeds) just so he can get into the same university as uke.
Uke touched by his sincerity started seeing seme in a new light. (This is where the hate is coming from)
Uke admitted that his feelings is/will be incomparable to how deep seme feels for him. Seme doesn't care. Seme just loves him. And then yeah, there were a few chapters after that, uke being sweet and all (peppering seme in kisses), it's basically a happy ending!

I recommend taking a break reading this. At least for me who has read the raws, it's better to stop reading here, especially if you're not fine with dubcon. It's better to stop subscribing to this or at least take a break. I'm def gonna do the latter. I'll just read this in one go once the English are all updated.