Yuuri's family has tended the local shrine for as long as anyone can remember, and he expects to take over after graduation. Then construction workers at his school unearth an old clay vessel that Yuuri recognizes immediately — it matches something at the shrine, connected to the local legend of Tayutayu, a divine being said to bring misfortune to those who handle the sacred objects carelessly. Yuuri and two friends try to warn the school. Nobody believes them. When the vessel is damaged and its contents disturbed, something is released. The next day, a girl named Mashiro appears at the school and tells Yuuri specifically that a dream can now come true. Neither she nor the legend she is connected to makes clear whose dream it is, or what it costs.