Aki Hagiu

Since the discovery of fantastical dungeons all across Earth, slaying monsters and clearing out dungeons has become a popular pastime. Twenty-seven-year-old Karaboshi Haruki dreams of gaining recognition as an adventurer, but he's got two monstrous problems: he's socially invisible and has literally no skills at adventuring. When a dungeon suddenly appears in his garage, however, he finds a skill board that allows him to level up faster. The dungeon-diving...

"A FIGHT TO THE DEATH. Haruki and Karen have almost completed their request! With Ooiso safely in their care, all they have left to do is leave the dungeon--but that's easier said than done. Just as they reach the gate, they run into Shikama and his unsavory crew, and a monster swarm. Haruki is left with only one logical choice: fight like his life depends on it...because it does!"--Page [4] of cover.

Now that the monster swarm boss has been defeated, Haruki heads back into his garage dungeon to push his skills to the next level. But something weird is going on! All signs point to a boss battle, but he’s not the one fighting it. Who else is in his dungeon?!