In this world, magical girls are necessary because monsters and demon kings exist. Each magical girl has her own fairy. There are water fairies, fire fairies, grass fairies, nature fairies, sky fairies, and more.

To become a magical girl, three conditions must be met. First, one must have a kind heart and a desire to protect the world. Second, one must not use magic to bully people at will. Third, one must protect what is precious.

Furthermore, magical girls do not age. For example, their age remains frozen between 2 and 24 years old. They are much like fairies or elves.

The races include witches, elves, humans, dragons, vampires, angels, demons, and so on. Lee Ruhee was an elf. Specifically, she lived about 4055 years ago, which means 2026 years before the current era. At that time, Ruhee was an elf and a magical girl. Now, it is the year 2030.

Currently, Nayeon, Jihyun, and Leehyun are on an adventure. However, Nayeon is already feeling hungry. "Ah... I'm hungry. Can't we take a short break?"

Nayeon greatly admired Ruhee, the magical girl from 4055 years ago. She became a magical girl because of her love for Ruhee. Meanwhile, Jihyun...

Jihyun was punished for playing with demons as a child and was cast down from heaven to the human world. Furthermore, if she removes her eyepatch, her eyes will burn and kill anyone who looks at them. She is commonly referred to as a fallen angel.

Leehyun set out on her adventure alone after someone set fire to the dragon village when she was four years old. She eventually met her friends around the age of 23. Leehyun has been using a bow since she was three years old.