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He is just a teenage and taesan keep trying to contact him knowing that it will bring wrath of the asshole that name I don't even remember. So I'm pretty sure he has the right to think what he wants about him and not anserw his text and all, it's not like he is the one who beats him or makes his life a living hell.
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Welp, now that's just showing me that some people really shouldn't touch things they don't understand, for what do you reach for psychological story if you just gonna hate mc for being a literally a kid in front of a situation that sometimes even adults have problem to deal with, also being on internet dosen't mean you are anonymous. For me it dosen't matter if some kid on internet thinks they are amazing because wow they bean mean on internet! Amazing, really.
Also hating on character for doing things and then resorting to the thighs you hate on is ironic. ;)
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Also mc isn't a bitch to taesan for "taking" his crush, like you said he always responded to taesan, come when he wanted him to and give him an advice. Yes he didn't wanted to do any of that beacue of the crush he got, but he still done those things regardless.
It's only now when he found himself in a situation that could gone a lot worse, (let's be honest, he got lucky with just some bruises and scratches afterbeing pushed the stairs.) He could break some bones, hit his head and if that was hard enough, he could die.
And the only thing he did after all that. Where I would be already pissed enough to ruin his crush life, he just stayed home. Said nothing, come back to school only after some times and literally done nothing. He just didn't spoke in defence of taesan and bully, but why should he? He is gay himself, he would suffer from it and also after that shit that night? So of course he didn't say anything. But the situation of the gossips wasn't beacuse of him so he is innocent in that point.
MC for the love of God stop being such a two faced bitch to taesan. He in every way has a woese life then you but you treat him like dogshit cause he took you crush? ridiculous