Ever heard of an "alpha mate" before? It’s someone who’s paid to be an alpha's sexual plaything during their rut. Or a person who’s used by a non-alpha who wants to present as an alpha. Which is why Sejun is not at all pleased when his childhood crush, Yeonwoo, is brought in as his alpha mate in the hopes of turning Sejun into a true alpha. Here's a secret: Sejun is already an…