Godly Charm

*i'm going to keep changing between female-leading and male-leading because i'm not sure which one my novel falls under* Once every decade, an immortal will appear in the human realm to fight off any dangers that have escaped from the underworld. This continued even into the modern era, where humans have developed high-tech weapons to defend themselves from others. Still, once every ten years, the immortal will roam the Earth, whether or not their help is needed. Of course, as humans figure out ways to thrive on their own, it makes the task for the immortal much lighter. They are free to wander and explore within the realm, it is not surprising if one develops relationships with other humans, or if one involves themself in a human's life. All is fine, as long as the immortal completes their task before they leave the realm for the next to come. A decade has passed, and Lune finds himself headed down to Earth, unaware of the unusually normal, human tasks and adventures that await him this time around. The year is 20XX.