It's about this japanese boy who goes with his father to another county.
The boy picks something up and returns it to it's owner.
But he steps in the kings harem, a deed punishable by death.
Everyone decided to have the boy executed, except the king who
said the boy for himself.

I remember, the boy was being thought by this guy named 'Q'
who had his arm cut off when he was a boy.

any answers would be greatly appreciated 😀

It should be Honoo no Suna ^.^

Thank you very much ^_^