Yuri is like a kindergartener who bullies the person they like but the bullying and yuri both are on steroids
I dont even think he knows he likes seonwu yet or maybe he hasn't even liked him yet. he's still hung up on his sister LOL. also I think its the environment and how he grew up that made him act a bit bratty, bc he's pretty bratty towards his best friend too, you could also say he bullies his best friend too and he doesn't necessarily like him romantically.
I am back here