Sorry honey, he's not gonna change.
No character development whatsoever. But there's a development in their relationship i mean he treats tae way better (and gets jealous easily) but still an ass to everyone
"He treats Tae way better" that's literally called character development??Character development is when the character is starting to have more likable personality and is being careful and turning into a green flag right?So what you said literally does mean character development which is slowly developing prolly. At the end of the day Illay will also become a green flag just like Taeju and the rest
Still waiting for Ilay's character development ,hope he gives Taeui a break and sorts his feelings out and turns into a green flag magically