Karaboshi Haruki has no presence as far as can be recognized, and so he became an adventurer with only the desire to "stand out." One day, a dungeon appeared under his home in Hokkaido. Coincidentally, he picked up a "Skill Board" with which he can spend skill points to increase his growth rate. Is it possible to become a popular person by obsessively diving into your home dungeon everyday? Based on the popular fantasy webnovel: "Let's be an Adventurer," winner of the 6th Net Novel Grand Prize.