beta
Technically it isn't incest because both characters have not lived their whole lives with eachother so there isn't really that cultivated bond you would get from say, a step family when you were a child. Like, Sunwoo didn't even know about him til their families had dinner so obviously he would get a crush because he wasn't raised into cultivating this mindset of thinking jeunghyun to be his brother, so incest is clearly NOT present in the story. They are not related nor were they raised together! Sunwoo may act young but remember, he is a COLLEGE student therefore an ADULT so he knows his thoughts and actions and have autonomy over them like a normal adult.