Ihoujin, Dungeon ni Moguru

In 1946, the opening of gates to another world initially offered humanity a new beginning. However, fierce resistance and heavy losses quickly extinguished this hope, leading to a somber non-aggression pact. Disenchanted, mankind shifted its focus to space, leaving the alien world and its enigmatic dungeons behind. Fifty years later, a ambitious corporation resurrects the endeavor to explore these otherworldly depths. A specialized unit, comprising five experienced individuals and three sophisticated artificial intelligences, is assembled for what is expected to be a rapid, technology-led subjugation. Their advanced armaments and innovative tactics are designed for a straightforward advance into the unknown. However, an unexpected turn of events, possibly a cosmic anomaly, disrupts the expedition.