Eiji lives in a world where there are two main races -- Adventurers and Villagers. Both come in very different shapes and sizes, but most professions. Villagers tend to stay in small towns, cities, or anywhere that has other people to interact with. Adventurers move around, constantly. They're nomads and are born to move. Eiji grew up in a big family with her Mom, Dad, one sister, and three brothers. Her father was an adventurer, but soon after a huge battle outside of their Village he was found missing, or dead, nobody knew. Eiji is the youngest of her four siblings and was soon cut off from the rest of the world due to her mother's overprotectiveness. Adventurers tend to get sick if they don't travel the world every once in a while. Eiji was born more an adventurer than the rest of her siblings, so her childhood was filled with sickness. At the age of 15, she snuck out of the village with her childhood friend, Isuki, and found herself loving the life of a normal blooded adventurer.

By the time all of her siblings were out of High School, they were all prepared to leave the Village and live the life of an Adventurer. Adventurers have a specific blood type that makes all of their children some kind of an adventurer, like a miner, a farmer, a merchant, or just an adventurer, somebody who travels the world for fun, and nothing else. Their mother knew this and prepared herself to let go of her children and let them live their own life outside of the village. Two of Eiji's siblings decided to stay since they had no need for leaving the village. The rest went off to live their lives. Eiji's mother was aware of her daughter's blood type, and wanted to give her a warning and stretched out goodbye, knowing Eiji was going to be in more danger than the rest of her siblings. Eiji thanks her mother before leaving with her friend Isuki, finally going off to live the life her father once lived. With the bracelet her father gave to her as a little girl, she had no false hope for the future.