This point of view is far fetched. I believe he loves her and yes he is also obsessed with her. However, you make it seem that it would be easy for him to put her in a better home and tell her not to work as much when there’s a multitude of factors on why that isn’t possible. One, Na-He is proud and would never let him do that. Hell, at the beginning (still believing that he’s poor) she didn’t want such a good looking young man helping an “old woman” like herself. She’s always worked hard for what she wanted and doesn’t appreciate handouts. Which makes this a bit more realistic. Secondly, the older brother is watching him like a hawk and so is the father. Any expense is tracked. He wouldn’t have been able to hide paying for her lifestyle or hide her. His whole father is trying to arrange a marriage. Which leads to the Third reason. His father is freaking scary which they noted various times. If he finds out about Na-He getting in the way of the future he laid out for his son. She’d mostly end up in a body bag.
Ok.
He doesn't actually love her. We know it's obsession but if he loved her he would get her somewhere safe and clean. Make it easier for her and either stop her from having to work or make a position easier for her that she doesn't have to work as much. This and the fact the chapters are becoming confusing and the plot seems lost. Idk man other than the art and I wouldn't even say that cause everyone who's a main character looks similar... So it's confusing. I don't see the point other than the art tbh