
This is told at the beginning of the Manhwa, I don't know which chapter because it's been a long time, but it's at the start of the story. Ian was prepared to move to the USA and practice motocross, then TJ sends some guys from the gang to beat him up, which ends up being more serious than expected and Ian breaks his leg. He goes to visit Ian in the hospital to tell him, but Ian doesn't let him. About the prison, Ian kills the guy in self-defense, but when TJ is talking to the lawyers, and they say Ian won't be imprisoned, he tells them to send him to jail for two years.

I read Wet Sand all over again because I wanted to make sure I understood the storylinecorrectly... And I completely interpreted them differently from what you said.
I'm not defending TJ, but I think he didn't broke Ian's legs as it wasn't really mentioned that way, and he had to send Ian to prison so he could save him from getting killed by the members who witness Ian accidentally killed a guy in a fight?
Maybe I interpreted everything in a wrong direction┗( T﹏T )┛ maybe it will make sense later on the story? (๑•ㅂ•)? It could also be that there are details left explained? I dunno...
Well, let's see what'll happen next ε=ε=(ノ≧∇≦)ノ
Will Ian ever confront TJ about the things that happened to him? The guy ruined his chances of leaving the country, broke his leg, sent him to jail, and left him in debt, and all you can think about when you're around him is sex? Okay, they have chemistry, but is that it?
And then we have Jo. At the beginning of the Manhwa, Ian and Jo had a cool connection. Ian confided deep things in him, and it seemed like we would have a parallel between a normal life and a life in the gang, but the author seems to have abandoned that too because now Ian and Jo also don't talk, their relationship is stagnant.