She was just taking a nude swim in the cool waters of the forest lake, but… This girl was rather unlucky…Once it starts taking in magical energy, it continues to absorb it until its victim is dead. In order to gain all of the nourishment, the magical energy is converted inside the organs, where it can exist inside the body for a lifetime.Elves are a high race known for magical power. Said magical power is the staple diet of many apparitions. How is this apparition living in an elves’ lake?