A Nobody's Way Up to an Exploration Hero

Kaito Takagi is the definition of an unremarkable high school student, a background figure who drifts through life without distinction. In a modern Japan where mysterious dungeons have suddenly appeared across the country, he works as a low-level explorer, spending his days hunting slimes to earn modest pocket money. Content with his invisible existence, he quietly admires his childhood friend—the most popular girl in their class—from a safe distance, never daring to step into her world. His mundane routine shatters when an unprecedented golden slime materializes before him during a routine dive. Upon defeating the creature, Kaito obtains an extraordinarily rare item valued at hundreds of millions: a mystical card capable of summoning legendary beings. When he chooses to activate it, a breathtakingly beautiful warrior maiden answers his call, forever altering his destiny. No longer confined to the shadows, Kaito must now rise above his former life as a nameless nobody. This thrilling modern battle fantasy chronicles his extraordinary ascent from an overlooked mob character to a formidable exploration hero.