CALL TO ADVENTURE! Defeating Dungeons with a Skill Board

Five years have passed since mysterious dungeons materialized across the globe, unleashing hordes of monsters into the modern world. In response, ordinary citizens stepped up to become adventurers, battling fantastical creatures and clearing these dangerous labyrinths to protect humanity. Among this new generation of fighters is twenty-seven-year-old Karaboshi Haruki, a struggling rookie who consistently falls short of expectations. Overlooked by his peers and outmatched by far more powerful adventurers, Haruki finds it nearly impossible to defeat monsters or secure valuable treasure. His fortunes take an unexpected turn when a dungeon suddenly manifests directly beneath his own home. Recognizing a rare opportunity, Haruki wonders if this private labyrinth might serve as the perfect training ground to finally bridge the gap between himself and his rivals. His luck improves even further with the discovery of a unique Skill Board, a special tool that grants him the ability to level up at an accelerated pace. Armed with this newfound advantage and a personal dungeon to explore, Haruki embarks on the thrilling adventure he has always envisioned, determined to prove his worth in a world defined by danger and discovery.