Here is not the place to ask that, you should search on deeper webs if you want that type of stuff. The only one I can think of is Nii-chan from Harada and Christopher Robin to himitsu no mori , none of them are here.
Im not someone in the place to tell you smt but plz dont ask about that type of things, if thats your preference you should search for yourself
(Plz dont think im weird, this mangas became very popular around 2019, i felt sick reading them, i regret it)
Girl, I gave you what you want, but again, if you didnt know, peodophilia in this site is forbidden, bc thats what you are looking for. Dont complain if people get mad. You could have worded it better like searching for representation of child sexual assault trauma in a mc with NO sexual stuff, cz what you are saying could easily be taken as "im looking for pedo stories where the abuser ends up with his victim" not as if you were lookin for representation of it. Think better what youll write, specially when you are in "family" friendly sites like this. Go to myreadingmanga, youll find the ones i gave you there.

Any stories that portray grooming (sexual or non sexual) in a tasteful manner and not in a way that feels like I'm reading some bad daddy kink smut?