(Inspired by @callmeyull)

You acquired a book concerning devils in a shop recently. Now, you have the chance to open it and see what is inside. You thought of summoning the least harmful looking demon, but unknown to you that you were calling for the most powerful and deadliest demon. In order to summon the demon, you recited the texts loudly. There was red smoke all over and before your eyes appeared a big winged demon with white eyes and hair. The devil grinned at you.

“Hi.. little.. princess~”