The Hero Is Overpowered but Overly Cautious, Vol. 6 (light novel) (Hero Is Overpowered But Overly Cautious (Light Novel))

Summary

The invasion of a malevolent deity has brought the spirit world to its knees. Rista falls unconscious amid the turmoil, and when next she opens her eyes, she finds herself in Gaeabrande... And if that wasn't confusing enough, it seems Rosalie Roseguard has teamed up with none other than Chaos Machina, now an ally of humanity! Nothing makes sense anymore, so why not double down on the chaos? This time, in order to save the spirit world, Seiya's next training destination will be...the underworld!