For decades, mysterious dungeons have been popping up all over the world. The resources found within these dungeons have completely reshaped human society, turning life upside down. In this world, Tsukasa Kisaragi, a high school student and active dungeon explorer, harbors a lingering regret. Back when he first got his explorer license, his social anxiety held him back from forming any party or making friends. But whether it was a blessing or a curse, Tsukasa was born with an extraordinary talent for dungeon exploration. He was so good at it that even solo, he could conquer any dungeon without breaking a sweat. He got used to going it alone, and before he realized it, he had become one of the few EX-rank explorers in all of Japan—so rare they could be counted on one hand. Despite his incredible skills, Tsukasa kept his true identity hidden, living a low-key life. But one day, he stumbled upon something that would change everything: dungeon streaming. And from that moment, his world would never be the same.
The silence following the Keeper's defeat felt unnaturally heavy, as though the entire dungeon was holding its breath. The air had shifted, as if the energy trapped here for centuries had been released, leaving behind a strange emptiness. Kijin and Raijuu stood by my side, both of them visibly exhausted, but alert. I took a moment to catch my breath, my eyes drifting down to the object in my hand.
Its faint glow had intensified, the symbols shifting and pulsing with an unfamiliar rhythm, as though awakening in response to the Keeper's departure. A small, almost imperceptible hum vibrated through my fingertips, filling my mind with fragments of images and whispers that felt like distant memories—hints of a story buried in time.
The chat was alive with excitement and anticipation.
: You did it, Tsukasa! That was the most insane battle yet!
: This whole floor feels different now. Like you broke a seal or something.