Who is the white haired guy next to the Gandalf/Dumbledore on the Instagram warning

I think it's Rowan from Why Are You Doing This My Duke

Nope I thought so too but I checked and it wasn't him; -;

it took me more than 15 minutes but he's from The Baby Raises a Villain, I know he's her father. Unfortunately it was just has a promo manga for the novel.

Thank you!