Demon Days (Male Reader)

Part of the Frontier Series:

In a time where humans and demons coexist, a lone warrior travels across the land. He aims to find the one he has lost long ago and reclaim his honor.

Sai lost someone she loved dearly when she was just a girl. Now, she travels to help those in need. However, she hides a secret that could get her killed.

These two strangers will soon find their destinies crossed on their crusade to slay the powerful Demon King himself. But, they must first take down his four generals and save the world from an all out invasion.