Thanks for replying! Sadly it's pretty blurry as I've mixed all stories I've read in my head, but I remember that the art is pretty clean and round-ish (in the vein of Sakura Rico/ Yamamoto Kotetsuko). I remember that it's pretty short and completed(?) The father gives his blessing, they visit the black haired boy house after dates(?). The mother died when he's born (I think? Forgot) hence father's very protective. I wasn't sure whether the black haired boy's sickly or just shy.
Sorry, I can't remember a lot of details, hope those are helpful to narrow down titles! Thanks again!
this is not the manga I have in mind earlier but is this the one you're looking for?
https://www.mangago.me/read-manga/rational_pervert_romance/
Have been looking for this title but can't seem to find it. I'm not sure whether I remember it correctly, but: I remember it's school setting. One of the pair is an innocent, sheltered, black haired boy, he likes learning things (not sure on this). His father is very protective (appearing on the manga). I'm not sure about the other one, I think he's a delinquent.
I've been looking with keywords for "innocent", "sheltered", "delinquent", but can't seem to find it.
Thanks!