Be Heun

Pronounced – Bee heun
From: Easy Going Scans
There are some heroes whose names you do not know, whose faces you have not seen… They operate secretly, and their actions can make a difference in the outcomes of wars. Be Huen is the story of such a man. To follow his story, one must search in the shadows, for that is the only place you could find him…
Webtoon from Naver
Please address this work as a Manhwa (Korean word for cartoons)