Based on Flona's novel, with the same name.

Alphas lust for Omegas, and Omegas want Alphas. That’s the way of the world, but Karlyle isn’t your typical Alpha. He doesn’t thirst after every Omega he sees—well, let’s say that things are complicated. Karlyle feels no need to change, but when troubles occur with his sex life his doctor suggests something surprising. Try sleeping with Alphas, instead of Omegas. Karlyle finds this solution strange, but the doctor says he knows just the person to help him out. Ash comes into Karlyle’s life just like that, and Karlyle finds himself thinking about Ash more and more. More than friends, but not quite lovers—how can we define this relationship? (Lezhin US)