While Hyouma Kunato has started to feel at ease with Botan Nagatsuki and her family of tsukumogami—objects inhabited by spirits known as marebito—he has not lost sight of his primary life objective: revenge. Unbeknownst to Hyouma, while he is training in Kyoto under the Kadomori family's supervision, the Bureau of Traditional Music, a trio of musical instrument tsukumogami, initiates its scheme. The group interrogates Botan's family concerning their intentions regarding Hyouma's proximity to the individual who embodies the boundary between the human and marebito worlds. Shortly thereafter, the paper umbrella tsukumogami that Hyouma had been chasing for years suddenly resurfaces and kidnaps Botan along with her university friends. Hurrying to rescue the one he vowed to protect, Hyouma may need to adjust his priorities if he intends to honor his promise to Botan.