As fall season rolls around, high school student Tamaki Kasuga is on her way to her grandmother's shrine in a village surrounded by nature. When she is attacked by three drowned gods, she but is saved by a surly boy named Takuma Onizaki by having her recite incantations to ward off the drowned gods, before the two make it to the shrine. Tamaki learns from her grandmother, Shizuki Ugaya, that she is destined to be the next Tamayori Princess, due to her ability to see supernatural beings, and it is her fate to reseal a sword called the Onikirimaru. Throughout her day, after she realizes that Takuma is a student at her school, she meets an eccentric Mahiro Atori on the school roof, encounters a nonchalant Yuuichi Komura in the library, and greets a kind Suguru Oomi back at the shrine, where is explained that the four of them are the Guardians, who are bound to protect the Tamayori Princess.