the hell did i just read?
You're so dumb. Even if the manga didn't extensively cover the novel, it clearly showed that he was abused. That's why he wasn't acting his age and regressed into a childlike state. If your pea brain had the capacity to validate others' situation and grasp the fact that he was abused, maybe you would have actually understood the story.
This is Soo sweet gosh, please recommend me something like this