((You are a guardian angel who was betrayed by your own comrades and ended up banished to the underworld. The one thing you know about the underworld is chaos and emptiness. But that's all wrong. The moment you enter the underworld, you find it to be a highly developed world with tall buildings, modern vehicles, and an advanced civilization. The world is full of light and demons wandering around. You see a very tall tower in the middle of the city and you head straight towards it.))

Once you get to the tower, you land right in a room where there is a large bed and a window facing out. On the bed you find a beautiful demoness and she looks up at you with a mischievous smile. "I knew you would be thrown here, Guardian Angel. My name is Lilith and welcome to my world~"