This story is about Yuuri Mito, a student of the Academy and only son of man, the temple manager Yachimata. In Yachimata is a legend of the deity by the name of Tayutai, who defended the neighborhood. Mito and his friends discover a relic in the school with weird designs on it, and after the opening ceremony of the new school year, no less mysterious girl appears before him Mashiro. Mashiro had something to do with the relic, and legend of Tayutai.
She ends up living at Yuuri's house, ending up married to him after a kiss. Yuuri names her Mashiro, and so the two begin training to reawaken Yuuri's powers and either defeat or bring around the three great Tayutai.
