The Lamia Princess is a Streamer

In a world forever altered by massive, simultaneous natural disasters that caused mysterious dungeons to materialize across the Earth, humanity has been forced to adapt to a terrifying new reality. Amidst this dangerous landscape, a young boy named Shun decides to join his classmates on a test of courage, venturing into what is supposed to be a completely safe, empty dungeon. However, their reckless excursion quickly turns into a nightmare when a colossal monster unexpectedly manifests within the very dungeon they entered. Panic ensues, and in the chaos, Shun's own classmates betray him, using him as bait to distract the beast and secure their own escape. Abandoned and facing certain death, the young boy braces himself for the end. Yet, rather than meeting his demise, this harrowing betrayal sets the stage for an extraordinary destiny. What begins as a desperate fight for survival transforms into the beginning of an unpredictable journey as Shun resolves to become a professional dungeon explorer. His strange and fateful story is only just beginning.