It's good that Ido cares for Sejin enough to remove his abusive family from his life but I don't think he should've done this without letting Sejin work through his feelings first. Often times we need to realize the abuse we went through ourselves before we realize what other people are saying is true i.e. the abuse. I think Sejin will have a hard time being happy/relieved that Ido did this.
They're all so adorable