50 years have passed since the release of Tayutai, which were sealed in Ashihara-chu. People have since recognized their existence and Tayutay also began to strive for life in harmony with people. The city of Yakotami-chu, where Sora lives, was blessed with the most favorable spiritual energies of the country. As such, it was designated as a place where people and Tayutay can coexist, and began to develop rapidly, attracting many people and Tayutay.
Once Sora managed to settle a shallow fight between a child and Tayutay. It is not uncommon to see such cases in this city. However, he was surprised when a girl with cute ears on her head appeared before him, claiming that he was the one she was looking for. She led him to the Tayutai shrine, the temple of Yatimat, and turned to him with blinking innocent eyes.
"I want you to become my husband!"
He could not understand the true intentions of the girl Kohaku, but after hearing explanations from her mother Mashiro and deeply impressed by her enthusiasm, he agreed to help her realize her goal of forming the "Society for the Coexistence of Man and Tayutay."