Old Knight in the Frontier: Bard Roehn(2016)

Henkyou no Roukishi: Bard Loen

For some reason, Bard Roehn, an old knight, sets off on a carefree solo journey. What was supposed to be a laid-back trip to seek delicious food and savor the subtleties of life turns out to be the whirlpool of a gigantic conspiracy?! But it was the beginning of an adventure told around the world!

(Source: K Manga, edited)