Turning this into a full series would be interesting, though it's DEFINITELY dicey (especially with Zyu being a father now, himself)
I do see several ways for it to develop pretty well and deviate from the grooming into pure child rearing, which thankfully DOES seem to be the idea here.
That kid's gonna be a MENACE to the population when he hits his teens - that, or he'll be so desensitized, he'll become a saint lol