The Mysterious Twin Doctor : Uncanny Sword and Lonely Surgeon (4) Fujimi L Library

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Don't say, "It's better not to exist." I want to save you. I want to save you. While learning under the two mysterious doctors Haru and Arashi, Riri meets Kanemitsu, the Tsukumogami of uncanny swords that have been sealed unused. A mysterious surgeon appears around him, inflicting harm on the Ayakashi?