Non-Isekaied Dungeon(?!) [ Dungeon Core ]

Tired of your cashier job? Why not a free promotion to Cosmic Janitor? All you need to do is die! Alex’s life as a cashier was mundane, right up until a woman walked into his supermarket with a Lovecraftian nightmare tucked in her bag like a teacup poodle. One "feeding time" later, and Alex finds himself at the end of his shift, permanently. But death isn't the end; it’s a career change. Instead of a typical fantasy reincarnation, Alex wakes up as a Dungeon Core. His new workplace? A pocket dimension of his own making. His new job description? Cleaning Earth of a magical pollution so foul it makes even the most resilient spirits gag. Now, Alex must navigate his existence as a sentient crystal, manage a hyperactive pink fairy who doesn't understand the word "boundaries," and struggle to keep his human morals while his new nature tells him that death is just... messy data. The planet is choking on corrupted aura, and Alex is the only one who can deal with it What to expect: • Dungeon Building & Management: Watch a pocket dimension grow from a dusty room to a cosmic filter. • Non-Human MC: An ex-human protagonist wrestling with his fading empathy and new, alien instincts. • Modern Earth Setting: No Isekai, no portals to other worlds, just a hidden supernatural reality beneath our own. • Humor & Eldritch Horror: A mix of lighthearted banter with a pink fairy and the looming threat of Lovecraftian "puppies."