Helck manga volume 2 features story and art by Nanaki Nanao.

Helck sets out with a group of demons led by the disguised Vermilio to defeat a mysterious group of winged soldiers and reclaim Castle Urum. However, before they can finish the fight, Helck and Vermilio are transported to a strange place. Now, the two must figure out how to survive in this new environment... and how to coexist!