In a world divided into clans, demons, foxes, spirits and mermaids. There are two sides: peace and war. Foxes are enemies with mermaids, Demons are enemies with humans. Although the war was over and a contract was signed that all clans would not be allowed to start a war. But the hatred is still there. Among them was a half-demon boy born from a human and a demon. But they thought he was a god, so they took care of a demon in human form like him. That boy is Tokito Muichiro. As he grew older, he became bored with humans, so he traveled around the world alone for 100,000 years. Because the clans live for a long time and will never grow old, he also experienced a lot except love. One day, Muichiro was resting on a large rock. He encountered a girl, but it seemed that she was not a human but a fox. A 6-tailed fox.

Muichiro: Who are you? He calmly spoke in his deep voice.