Link to raw?
Sorry did not mean to send it 2 times
MC never sets Taesan up! Kang Jun hates Taesan out of jealousy, but he never outright does anything to him in the story, instead just remaining an onlooker and at times stepping in to help him, although every time he does that it makes him hate him all the more.
Taesan sees MC as the only 'friend' he has as he's the only one willing to stick up for him in some ways, and in that scene Taesan is the one who called MC to come see him in the storage room, and Junwoo goes insane seeing Taesan trying to reach out to someone in his isolation because he wants Taesan to only be connected to him. Essentially, Taesan is just there to lead to the breakdown of MC/Junwoo's friendship, and to propel MC into becoming closer to ML. Yohan/ML has no involvement in anything with Taesan really.
Just finished reading raw updates. So basically the MC hates Taesan just bc his crush (Han Junwoo) has a crush on him (Taesan). So he's acting like he didn't care everytime Junwoo's bullying Taesan.
So days passed and the bullying continues, but each day passed Junwoo seems to have a growing feelings towards Taesan. That's why MC asked helped from ML to set up Taesan (*pls correct me if I got this part wrong*)
When MC and Taesan meet on a storage room, Junwoo rushed and punch the MC.
That's why my take is that, both MC and ML. both those characters on the cover are TOXIC