Ueeeeeeh I recalled niehime to kemono no ou again

He's their son

@saphyra that's another series

I know, but there are too many coincidences, starting with his last name, you'll see

I mean that niehime to kemono no ou is another series, and the one you're thinking, which is about his parents, is Hana and the beastman(づ￣ ³￣)づ