Musou no Kaitaishi

Dungeons suddenly appeared all around the globe. People transformed into "explorers," plunging into these mysterious labyrinths to gather unique resources found only within. Sakuto Kurose, driven by a desperate mission to save his childhood friend from an incurable illness, sought the legendary "Elixir," a panacea rumored to cure any ailment. Yet, he was cast aside by his fellow adventurers, deemed too weak to contribute in combat anymore.

Amidst the perilous dungeons and the challenges of the real world, Sakuto confronts both monstrous creatures and malevolent humans. Thus unfolds an exhilarating tale of otherworldly battle-action, where every step could be his last!