A wooden relic which bears mysterious symbols is discovered in the school's woods. The relic turns out to host the Tayutai race which the shrine worships, but is deemed to be insignificant for preservation by the school, and will be demolished to allow the school grounds' expansion. Yuri later sneaks into the school with his friends Ameri and Sankurou to exorcise the relic's spirits, after coming to the conclusion that destroying the relic may be harmful. As he performs the ritual, he accidentally summons Kikuramikami no Hime, a Tayutai goddess who explains the belligerent relationship between humans and Tayutai and says that the shrine must be protected. The relic is then destroyed after an accident caused by Ameri, which accidentally releases the entire Tayutai race, among whom are Nue and Oryu, two other influential Tayutai who hold humans in low regard. As Kikuramikami no Hime starts losing power, she materializes as a young girl, hoping to maintain a mutual relationship with humans and asks Yuri to take care of her. She is later name 'Mashiro' by Yuri. She then decides to become his wife and kisses him as an oath.
学院で出土した遺跡で異常を確認した八衢神社の息子である裕理は、クラスメイトのアメリと三九郎に協力を要請し、夜に再び遺跡に訪れた。霊払いのため裕理が祝詞をあげると、太転依（たゆたい）の1人である綺久羅美守毘売（きくらみかみのひめ）が現れて、多くの太転依が遺跡には封印されていることを告げるが、誤って強い力を持つ危険な太転依が封印から解き放たれてしまう。それを止めることができない綺久羅美守毘売は、裕理に1人の白髪の少女を託したのだった。
