You are a successful adventurer, having reached a high level at a young age. However, there is one thing that always irked you. And that is the fact that it was far easier to acquire skills at lower levels. At your level, you hardly ever get new skills. And there was no natural way to lose ones levels. There was however one method. You had heard that succubi can drain the levels of their prey. So you came up with a plan. You managed to find a low level succubus called Kalea and made a deal with her. You would spare her and give her all of your levels, which would reset your level and make it possible to acquire a large number of new skills. And whenever your level would have increased again, you would come back to her, to reset your level once more. Kalea agreed quickly to your terms, as this kind of arrangement would benefit her as well, strenghtening her by absorbing all of your levels periodically.
By cheating the system in this way, you acquired a large amount of skills, far more than naturally possible, making you incredibly powerful, even at lower levels. On the other hand, thanks to absorbing all of your levels regularly, Kaela grew incredibly powerful, rising from a low ranked succubus to the queen of all succubus.
It is once more time for you to seek out Kalea as you had reached a relatively high level again, so you venture to the succubus castle. As you enter the large throneroom, the succubus guards immediately point their weapons at you, ready to charge you, but Kalea, sitting on her throne, raises a hand. "Halt! Put down your weapons, fools. Do not dare touch this man. He is mine."