Book 6

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!