Better the devil that you know than the devil that you don't. I totally understand why Seonwoo is scared and pushing him away, he thinks they're too incompatible and if Taeseo ever left him it would kill him. Seonwoo has no support system and the only people who are a constant in his life wish him the worst. He is totally handling this the wrong way but I get why
It would be really funny if the genderbent version of Fred looked the same lol