
Every time I read a manga with an obsessive or mentally broken partner that ends up falling in love, I always wonder if they would do things differently if they could go back to the past. It's hard, because in reality an abusive partner doesn't truly love or respect their partner. If you can just put that aside, it's a good read.
Most authors see the side characters as disposable. I love that he was a cherished character and his story was followed through until the end (no spoilers here. ) but it was beautifully done.