Meikyuu Kingdom: Damu Tokushu Butai SAS no Ossan no Isekai Dungeon Survival Manual!
迷宮キングダム 特殊部隊SASのおっさんの異世界ダンジョンサバイバルマニュアル!
A veteran soldier named Taiga retires after two decades in the military and plans a trip to Japan to reassess his future. During an earthquake at the airport, he is transported to Million Dungeon, a complex world filled with caves, kingdoms, magic, and creatures. To survive, he must establish his own nation, though the challenges may surpass even his extensive expertise.
