Could be that or maybe because he was scared of Jaewon? Towards the end of Ch 31, we could see Jaewon send people to beat Yeongwoon. I think Jaewon did that to warn Yeongwoon about staying away from Seoin or maybe because he also hated Yeongwoon idk idk
wait wait, so if im understanding this right then youngwoo puts his distance b/c he doesnt want seo-in to have to be blackmailed??