Looking for bl where mc raises ml. So mc is oblivious or resistant to ml affections. Even arcs are fine
After Being Transported into a Book, I Adopted the Villain I’ve Led the Villain Astray, How Do I Fix It?
Dangerous Survival in the Apocalypse (MC practically found ML as a puppy but already grown up inside, just maybe injured, but MC does not know that. ML starts off as puppy -> child -> adult (novel still hasn't reached this part yet) and everyone thinks ML is MC's child lol)
Regarding what you're looking for, I can only recommend 2 novels: Ageless Seducer (MC takes care ML who has run away from his family. ML fall in love and confessed. At the start, MC is reluctant to accept him) The Heart of a Smith (MC picked up ML and educate him. At the start ML adored MC and regard him as his savior) There is also thread that have similar topic: https://forum.novelupdates.com/thre...the-shou-raises-the-gong.125416/#post-6343196 You can also use the tag Guardian Relationship to search for similar novels
Mistakenly Saving the Villain MC saves ML from a really horrible situation, and is super oblivious and thinks ML is the “cute, white sheep protagonist.” MC basically raises the ML and helps him become a “functioning” (if yanderes can be considered that lol) person again.
https://www.novelupdates.com/series/quickly-wear-the-face-of-the-devil/ In one of the Arc in this novel the MC raise the ML