Druaga no Tou: the Aegis of Uruk  

druaga, Druaga Kulesi: Uruk`un Kalkanı, La Tour de Druaga, The Tower of Druaga: The Aegis of Uruk, ドルアーガの塔 ~the Aegis of URUK~, 迷宮塔, 龙之塔

According to legend, every few years there is a time known as the "Summer of Anu." During that season, the sky-god Anu provides divine protection, causing all demons in the tower to lose their power. The country of Uruk has recently invaded the tower with the aim of suppressing these demons. They have established positions within the tower and are focused on reaching the upper levels. This summer marks the third "Summer of Anu," providing an ideal opportunity for the Uruk army to launch a mission to finally defeat Druaga once and for all. However, it's not just soldiers in the tower; there is also a city called Meskia that has formed on its first floor. This city hosts both soldiers and adventurers who have heard rumors about a legendary treasure called the Blue Crystal Rod, which is said to be located at the top of the tower. With various groups present with their own agendas, it's difficult to predict how events will unfold during this unique summer season.