He doesnt end up liking the other guy. Jaehyun is scared of Yohan, and he tells Jun how Yohan really is. That is the catalyst that makes Jun start doubting everything about Yohan until he gets proof and leaves him after graduation.
Wdym by doubting? Jun already knows that yohan is evil and he shouldn't like him , right?
A lot had happened. Jun still had lingering feelings for Yohan that made him waver, but then he heard from Yohan's sister what kind of person Yohan really was, and it shattered his whole world. He learned that Yohan lied for the love of the game. Apparently, Yohan had told his family back in middle school that his biggest wish was to have a boyfriend for Christmas, that his favorite dish was seafood (while Jun was thinking he hated seafood and was forced to eat seafood), and that he pretended to be religious even though he wasn't. He was also very spoiled; his dad bought him a motorcycle, and he crashed it several times.
Appearantly a photo of Minho and Seokhyun where they were kissing each other with their faces covered in blood. They were crying. It felt forced. Yohan spread the photos. In the end it turned into the idea that Minho and Seokhyun were jealous of Yohan.
This is Jun and Jaehyeon's conversation -
A chill ran down the back of my neck. If I had taken Kim Minho’s side back there, could I have been the subject of that rumor? I wiped the cold sweat from the back of my neck with my palm.
“Society’s trash.”
I wanted to run away right then and there.
“No need to call him trash... Everyone has a chance for redemption, right?”
“What? After seeing what that guy did, you can say that?”
“...That photo. Go Yohan must’ve forced them to do it.”
“Ah.”
I quickly covered my mouth. Damn it, Kang Jun. I just admitted the truth with my own mouth. I opened my eyes wide and looked around cautiously, and Shin Jaehyun raised his hand.
“It’s okay. I’m just curious. I’m not spreading it around.”
“...You’re not telling anyone, right?”
“Of course, you didn’t tell anyone about what I said either.”
A kind smile spread across Shin Jaehyun’s face. His finger pointed at himself before pointing to me.
“Same-same?”
“...Same-same.”
Novel readers, spoilers please ??