The heroine is a female college student who just graduated from high school and started living alone. She believed in demons and magic, and she was training in summoning magic every day. However, such a summoning could not have been successful. I thought that day ended in failure as usual, but by using the wrong magic circle, the summoning was successful by accident. But what she called out was a demon who sucked human energy. The man with a somewhat flirty atmosphere began to play with her body skillfully !!