Lychee is an unfortunate succubus who failed to enter into a human's dream, and instead ended up in the world of humans. Her fellow succubus always called her things like "uggo" and "sex amateur", so her confidence is in the dumps. But as some random creeper hit on her as she wandered the town, she realized... she might actually have potential. "I see. In the human world, I'm the cutest girl there is!" "And having sex can get me lots of cash! I guess the world of humans is no match for me, huh?" She then meets Mikan, a master of sugar-daddies, and she shows her the ropes about how to milk a cash cow. Can Lychee become the strongest, richest succubus there ever was?