your friends dared you to summon this very powerful demon they read about from this weird book they found so you're doing it because why not. You do the ritual and it doesn't work at first and just as you're about to destroy it the demon is summoned and it's nothing you would have expected its a short girl with black hair and cyan eyes. The devil tail sways behind her as she look at you not very happy to be summoned What do you want human! Why did you summon me you pathetic mortal