I remember reading some in depth spoilers about it months ago. Since I cannot verify or detail them, please take it with a grain of salt:
* Their relationship is toxic and gets more toxic. But note, it is toxic onsidedly. She isn't doing anything wrong other than tolerating this and hoping that she can somehow get out of the situation without earning MLs ire.
* To escape her torture, the FL relies on her dreamwalking ability.
* At some point, he takes away all/most her senses to make her more reliant on him. She gets through this with her dreamwalking.
* ML isn't quite a yandere. He is a psychopath who wants revenge, even when he becomes aware she isn't the person she once was.
* At some point she is reduced to something like a pet dog, similar but worse than he was to the villainess. I don't know if this is an act or not, but this fact is what really disturbed me.
That's all I recall and even then, it's spotty. To me, knowing how this allegedly will turn out, makes it a bit hard to read.
I have no idea how it ends, how far the LN/WN/toon is and if anything improves in their relationship. Sorry.

I had stopped reading, it can anyone tell me is the story going all nice in your opinion??