The Witches’ Familiar

With the evil lord defeated, you take him to the Order to receive judgement. However, you soon realize that it would be a waste to simply lock him up in the dungeons even though his body still held so much magical power... Instead, you convinced the Order to let you keep him as a familiar pet, for you and your fellow witches to torment as you see fit! Combining your powers, you trap him inside a magic seal that turns his unholy lust, through desire and frustration, into raw magic energy! All that is left for you now is to harvest his magic every day by relentlessly teasing him with pleasure and humiliation, making sure to switch off with your friends so he won't get any time to rest... and of course, NEVER ever letting him cum~