Guys stop being harsh on him and hate him he was clearly confused about his sexuality and his feelings The first time he rejected him he was indeed mean but he didn't meant it The second time he clearly liked him but he was afraid and confused about how he felt And he's trying to get him back because he realized his mistake ad he's trying to fix it so no he's not a red flag, he's a good guy but I totally understand how the other guy is feeling
No offense but he is a red flag not because he rejected him twice .. but because he wants Joon to suffer or feel down when he is not with him . I don't think that is healthy. He is obsessed with Joon and that is also kind of creepy.
But it doesn't mean that I don't support him😂 I support him cause this is fictional but if the same thing happens to my friend my would say stay away from that person