Everything Ohn likes about "Seowoo" is the actual Seowoo not Jaewoo. Jaewoo knew Ohn for years but didn't care until Seowoo was interested in him. Jaewoo could have said no to pretending to be Seowoo but he did it anyway. Seowoo just needed Jaewoo for the introduction and Jaewoo should have backed off awhile ago. There has been multiple occasions where Seowoo has proved he is able to spend time and talk to Ohn on his own. Seowoo is already shy and idolizes Ohn so it makes sense he would want help to make the first move. Ohn doesn't like Jaewoo and he probably had some part in Ohn's trauma for Ohn to dislike him so much. Jaewoo taking advantage of the situation to get closer to Ohn fits right into the Ohn's bad image of Jaewoo.
This is officially translated on Copin Comics and it is up to chapter 34!
i couldn't find it.
This is completed on Copin Comics. It is 10 chapters total and the first episode is free.
Here is a link for the novel!! It is in Chinese but you can read it with google translate
https://www.gongzicp.com/v4/novel-4737.html
I feel like Kang Woojin isn't as bad as everyone is making him out to be. It seems that he didn't know about his grandfather's threats so he just saw it as Lim Haegyung and his brother ghosting him for no reason. They were like Kang Woojin's only friends so being ghosted by them probably hurt him really bad. Then when he sees Jung Wook using Lim Haegyung so he exposed Jung Wook. He chose to hurt the person (Jung Wook) who was using the person (Lim Haegyung) who hurt him.