She isn't of course. But, maybe, somehow she'll not be bad as the others are, someone can be bad or poisonous while being too much in love for someone, or overprotective etc
I think it's too bad that the transition was that fast, we could do two or three chapters, to describe more precisely how he would become like this and get out of his depression state, but no matter
Just noticed, the lyrics of the song Seo singing... "it hurts, it's all a lie/ If i meet you again, I can love you again" huuuh ?..... last part was for his ex-boyfriend ?
I find it sad that the "transition" between previous and new joonwoo is that fast and rushed, he didn't even talked about his ex-friends or school, it's too rushed, fast, but not crippling