Seven noble families fight for control of the mythical land of Westeros. Friction between the houses leads to full-scale war. All while a very ancient evil awakens in the farthest north. Amidst the war, a neglected military order of misfits, the Night's Watch, is all that stands between the realms of men and icy horrors beyond.

Dariel, a dark soldier in the demon king's army who cannot use magic, has risen to the position of assistant to the Four Generals with his talent and energy, and has been wielding his skill. However, as soon as the Four Generals are replaced, Dariel is fired from the army. Dariel is devastated, but when he arrives in a human village, he finds that his adventuring skills, which are supposed to be useless to demons, have blossomed! "I was... human?" Dariel decides to spend his second life in this village, and the requests start pouring in! Trouble! False charge! Duel! With his natural skills and the adjusting power that he developed in his old place, the former dark soldier solves them all!

Humans are little, but not inferior, in the wild. They are all putting in a lot of effort and growing rapidly in their own ways, whether it be Shennong and his people in the human sphere or the many clans in Beiye. Despite being bewitched and restrained by the Star God, he would mount a tenacious resistance against the Star God in order to safeguard his tribe, family, and blood in the tribe.