100-man no Inochi no Ue ni Ore wa Tatteiru: All They Can Do Is Look Up at It

SINOPSIS

The threat of the orcs has passed, but a dragon hanging out in the caldera brings a new threat to the island. It appears to be sucking the life force out of the islanders to store up energy, but it would be suicidal to try to attack it head-on. While fleeing, Yotsuya and Torii stop to help one islander...