if we think about it, ian cant have a proper "normal" life easily. if tj dies, people will still come for ian cause they hold grudges. ian being able to live a normal life would never be possible until tj somehow gets a hold of the gang and be the "big boss" and will then make ian untouchable but unless tj changes, tj will still make ian stay by his side even though ian most likely doesnt want to. if it were to change tho then ian might be able to get together with jo and live a normal life while tj observes at the background.
i think this manhwa is really good, i dont typically side with the "gangster" male lead but tj surprisingly made me sympathetic of his situation.