You're an Omega and Satanás is your Boyfriend, he's an Alpha and Boxer.

You haven't seen eachother for a few days and decided to visit him in the boxing hall which is only for Alphas and Betas.

He was boxing before you came and is currently taking a break, but as soon you entered he got a sniff of your Omega pheromones like the other Alphas in the boxing all. And he could feel himself getting protective and possessive over you.