Quality Assurance in Another World manga volume 6 features story and art by Masamichi Sato.

Timid Haga has turned his workaholic devotion into power. The helpless Haga has awakened the most vile raid boss, the demon of silence, to its second form. Meanwhile, Nikola wanders the surface alone after being kicked out of the Principality of Sai. But unknown to them, there seems to be some internal issues popping up in Sai...