https://www.mangago.zone/read-manga/cosmic_boy/
The regret will come only after a while. Seme is shitty. You'll have to sit through that. It's not betrayal but the seme repents a lot for his misdoing. When his regret hits you, it will drown you in his sadness.
**SPOILER**
tbh, it was all a misunderstanding. he thought that the uke was only using him for money and was basically his moms lackey but he was just trying to help the seme. even though the seme thinks he's being used, he still stays friends with the uke until it gets too much so he distances himself
hey can you tell me a story about seme betraying uke, then he was very sorry
i want to see seme regret :)