I came across is awhile ago while searching for something to read/watch. I dont remember the title, yet only the some of the description. It has the main male character come back from a holiday to find the government has married him to a young girl (11 - 13?).

Can anyone tell me what its called?
I know its not Final Approach as ive already seen it..

Thanks to anyone who can help.

I would bet on Rizelmine

I bet that's the one