Tales of Wedding Rings Vol. 5 (manga)

Bidding farewell to the Land of Water, Satou and the others leave for Idanokan-the long-lost city of the dwarves-to find the last remaining Ring Princess and finally obtain the power needed to vanquish the Abyss King. But time is of the essence, as the moment of reckoning with Arnulus's ancient evil may come far sooner than anticipated. When all hope seems lost, one brave soul prepares to make the ultimate sacrifice...