Sui is suppose to be back luck, maybe it cancels out.
I think he will not get smaller, but will mature mentally as I think it's the idea of unable to learn and grow in a stifled environment. plus considering how long he has built it up it might take a few years to even make him shrink if that happened.
I wouldn't be surprised if the plot twist is that he can only spread luck via kisses or intercourse
┑(￣Д ￣)┍
I hope he does, because if not, this is gonna be creepy pedophilia with a kid in an adult male body, but a kid anyways
Yeah i hope that's the case
He needs some 'release'.
Boy gotta use his maguc wand for all that luck he wanted to release
So wait...he's big because he hasn't been able to use his powers so now will he start getting smaller now that he can spread his luck?