The Ending

My theories on what happened at the end:
- Jae-kyung never got to reconcile with Hansol and Kwon. What we saw in the middle of chapter was what he wished to happen.
- When Jae-kyung returned to his dad, his dad didn't actually regret his actions and apologized. Instead, he beated Jae-kyung once he returned. It's implied that the physical abuse got even worse and started to really affect his grades.
- Kwon actually did leave with his uncle.
- Hansol eventually did make new friends and hang out with them more.
- With two of his only friends leaving from his side, Jae-kyung's mental state rapidly detoriated and eventually he...

So yeah, Jae-kyung's dad is a horrible person