Enigma

i thought he was a dominant alpha like dojin

Byul and Siwoo are both dominant alphas. I just think we might find out that Siwoo is an enigma bc he’s much larger and stronger than even other dominant alphas and easily dominated Byul with his pheromones that one time.

i think the pheromones are just because it triggered the fight instinct of byul, simce alpha's tend to use their pheromones to show off how strong they are against their opponents. But who know, we haven't had much background info on siwoo, for now, i have the theory that his physic became like that due to taking part time jobs since middle school and all the fights he took part on

Nah they are just two alphas