Level 1 Demon Lord and One Room Hero(2019)

Lv1 Maou to One Room Yuusha

The Demon Lord has been defeated by a brave warrior, but is destined to arise again! Ten years later, he emerges early from his slumber to exact his revenge. However, he returns to find that neither the world nor the legendary hero are what they once were. Can the powers of darkness triumph over…a shut-in slob?

(Source: Seven Seas Entertainment)

Note: Includes three extra chapters.