Help me find this!

It's a bl omegaverse manwha, about MC who thought he'll be an alpha and can whore around with omegas, but he turned into an omega, so now he wants to whore around with alphas. The ML was his classmate who became an alpha, pretend to be pitiful in front of him, but actually quite cunning. It's a short story, less than 10 chapters I think. Very sweet, no angst.

I read it, forgot the title, saw it in tiktok, read it again, and now I forgot it again

Edit: maybe I was too vague. It was modern style. MC went to a party with lot of alphas and were flirting openly, then his alpha arrived suddenly, made a sad face at him, while threatening other alphas with his glare alone. MC was being quite oblivious and didn't notice the ML was pretending. He really thought the ML was teary type. They're adults most of the time. The classmates thing only a flashback to their past, I think.

(Wait, were they married? MC thought their marriage was just out of convenient, but the ML certainly not letting go. Idek if this part is correct or i mistook it from something else.)

But anyway, it's really angst-free. MC was really callous and free spirited. Not an angst-ridden omegaverse.