In Another World with My Smartphone, Vol. 16 (manga)

A pack of dragons is coming to lay waste to the Duchy of Brunhild! Now Touya and his Knight Order have their hands full subduing the dragons and opening the island dungeon so his country can flourish. What else is new? Meanwhile...his fiancées seem to have picked up on the shift in his relationship with Leen. Will Touya ever catch a break? And is the fulfillment of the prophecy of his nine fiancées finally in sight...?!