So..... I'll answer everyone in one post and won't reply after since I already dropped it due to the vomit I held back.
Ido WAS in the right, Sejin WAS in the wrong!! Sejin was the one to cheat this relationship first by stealing from his husband that opened his home to, AND trusted. Sejin misunderstood the situation with the brother, or wanted to so he can play the victim card. When Ido discovered what Sejin did, he gave him the silent treatment, which is the best way to fight with your spouse.
As for the so called SA, we have seen MUCH worse in the BL universe, and it was Sejin's stupidity that instigated it.
Again, this is gonna be the last thing I say about this, since I already dropped it and now I need to wash my eyes with something better

This thing started good, but now it's ass
Keep talking about how horrible Ido was in the past, I'm still waiting for the monster Ido to show himself.....
I'll say it again and again, IDO DID NOTHING WRONG IN THE PAST TO WARRENT HIS SUFFERING NOW!!!!!!