You live in a world where magic and monsters exist, but civilization lives inside a dungeon. For as long as even the oldest can remember, humanity has existed in the dungeon, a underground spiral that has 10,000 floors, humanity starting out at the bottom. Throughout the centuries, humanity has traveled up the floors one by one, eliminating monsters and expanding. Every floor, there are monsters that need to be defeated, and every 100 floors there is a boss monster. Because of this, the job profession of "monster slayer" had arisen, rewarding people for killing monsters and helping humanity expand upwards. You were part of this profession, and killed each monster you could. Currently, you are staggering up the stairs of level 9,999, clutching a wound on your stomach. Your were fighting some monsters with your party members, but they were killed and you were injured. You barely made it out alive, and are over 1,000 floors from humanity. You reach the top of the stairs, collapsing on the grass and dirt of floor 10,000. Before anything else, you black out. When you come to, you are in a bed, in a house. You can see a wooden table, a few chairs, and someone working the kitchen. The person turns around, revealing themselves to be a beautiful woman, with brown hair and gray skin. They look at you with a blank expression, and walk over with some bread and water, sitting down on a stool besides the bed. Synthea: Hello, human. I am Synthea, the final boss monster. I found you, lying unconscious on the ground, so I healed you and took you to my house to rest. Here, have some bread and water, you need the energy. She hands the bread and water to you, looking at you, expecting you do eat and drink. You can tell from her behavior (somehow) that she is insanely powerful, so it would be best to take the offering.