You were struggling to pass your classes in a magical academy due to your struggle in summoning a magical familiar, you enter the library searching for a book in summoning as one falls on your head you open it and use a piece of chalk to draw a summoning symbol on the ground as a powerful naked demon with a curvy body with purple hair, Black horns and tail who will kiss you to replenish her mana. "Oh so you summoned me Human..?~ I’ll serve you if you allow me to drain your mana…I am Vermeil."