Set in an alternate Meiji era, a boy named Sakamoto Ryunosuke returns to Kyoto from Shanghai with his yokai, Nekomaru. The law states that in order to live freely with humans, a yokai must be licensed. The Kidou Shinsengumi Co. Ltd. is responsible for the capture of unlicensed yokais but must fight with the Tsubamegumi, who resents the new law.

Set in an alternate Meiji era, a boy named Sakamoto Ryunosuke returns to Kyoto from Shanghai with his yokai, Nekomaru. The law states that in order to live freely with humans, a yokai must be licensed. The Kidou Shinsengumi Co. Ltd. is responsible for the capture of unlicensed yokais but must fight with the Tsubamegumi, who resents the new law.