
He's obviously interested in Jaerim but I don't think he's got bad intentions, I dunno though

***SPOILERS BELOW***
If you are triggered by severe bullying proceed with caution from chapter 73 and onward.
Don't get your hopes up for Ayeon. He's not who he appears to be. If you are triggered by by rape proceed with caution around ch. 79 - 81.
He's actually working with the girls who bully Jaerim.
He's only getting closer to him to carry out the plan.
He's tries to rape Jaerim.
The girls lie to Yuri and trick him to go see Jaerim, so when Yuri sees Jaerim being forcefully kissed by Ayeon he thinks Jaerim is cheating on him(¬_¬) and leaves.
This really breaks Jaerim's heart because he thought Yuri was there to save him.
Luckily Dong-gun tells Yuri to look at the bigger picture, that it's not what it seems. Jaerim was being bullied just like Dong-gun was bullied just for being friends with Yuri. Pretty much helps Yuri to realize Jaerim was about to be raped. After learning the truth he goes to rescue Jaerim.
I LOVE AYEON....... OMG...... ive seen ppl saying hes no good(?) but even so.. i love the bad guys anyways :') he seems like he has a twisted crush on jaerim and thats totally My Shit TuT (can you tell im a fan of ogawa chise lol....)