My Evil God Ex-Boyfriend Came Knocking

Here's what happened: I once treated an evil god like a backup lover. But that was in an infinite-flow world. Now I've saved up enough points to leave the Main God Space, and my only wish is to retire in peace. On my first day of retirement, the window shattered, and a little tentacle poked its head out from the corner. Me: . Keep walking the dark road, and sooner or later you'll meet a ghost. Can someone seal this thing away again? The Contamination Sealing and Inspection Center discovers a genius with the potential to become a future star among investigators. The only problem is that the genius doesn't seem interested in supernatural abilities. Investigators keep coming to his door, only to receive the same three refusals: "I don't know." "I don't understand." "I'm not interested." The Earth's barrier is shattered, and ancient evil gods invade. Every investigator is mobilized. This is the last stand to defend Earth! Yet on the front lines against the contaminants, everyone watches in astonishment as the young man they usually avoid takes to the sky, cutting down tentacles with every stroke. The young man looks back indifferently. "Stay away. Don't interfere with my domestic affairs." "What, do I have to teach you how to run, too?" B-king infinite-flow veteran bottom × charming, overbearing evil god top who's completely henpecked Main story told in third person. *More to be added if I think of anything. Theme: Building a harmonious global village starts with you and me