I understand what you mean, but I just quickly read thru this and I don't see grooming anywhere in this manga. Grooming is a very deliberate and methodical way to condition children to believe that the way that the groomer is treating them is normal, which takes advantage of childish naïvete in order to do inappropriate acts with them. But what happens in the story is that the guy raises a child and that child just so happens to develop feelings for him during this time which later get reciprocated when he's an adult. It's weird, yes, but *not* grooming. I know it can be tempting to throw around buzzwords for stuff like this but it's really important to understand the weight of the words you use, because overusing them in contexts where they're not actually applicable only works to discredit the cultural perception / the validity of claims from people who *actually* have been harmed by things such as grooming. ^^;
Its still weird as hell for someone to reciprocate feelings for a person they raised as a child. I apologize for the use if buzzwords in my statement but its personal disturbing to have people say it isnt a bad thing for someone to date someone they were raising three childhood. Just cause they are both adults currently doesnt make it odd that an adult man decided to reciprocate the feelings of someone they raised.
People whining about the religion discourse like the whole thing isnt about a priest obviously people are gonna talk about how they feel when someone close to there religion is being misrepresented or if there uncomfortable. Plus this man is a literal groomer stop whining about the whining if it bothers you take your own advice and scroll lmao. (=・ω・=)