Ryle and Louis

Ryle and Louis (ライルと槍〈(ルイ〉) is a manga written and illustrated by Nana Natsunishi. It was serialized in GFantasy from January 18, 2016 to March 18, 2017.

Plot
A rootless wanderer meets the prince of a certain country. This meeting just might be a ray of light in the darkness for the war that's tearing the land apart.