I read the books and it gets worse before it gets better, unfortunately. But it does get better!
I really wish authors would stay away from non-con scenes, but it is something that does happen in real life, and while some cannot get over it or through it, some do. I'm not making any excuses whatsoever. Gu Hai was most definitely wrong for what he did, but the book goes into detail of his thought processes and his feelings of hopelessness, blind obsession, gut-wrenching guilt, and even love.
Again, not glorifying anything. One chapter even made me physically ill, but the story makes you feel so many emotions. I will probably end up rereading them at some point, but will be skipping *that* chapter.