[Machine Translation] The twins, Haru and Arashi, are doctors of ayakashi, and Riri is their apprentice. While working with the twins to heal wounded ayakashi, she comes to know the personalities of the twins, who cannot leave the weak alone. In the spring of her senior year, Lily meets Kanemitsu, a mourning god with a demon sword, while helping at an antique exhibition. He is a sword that has been sealed away by an owner who wished to help others but did not wish to kill. Kanemitsu wishes that Riri, who can see ghosts, will make use of him. But then, an unknown sorcerer suddenly appears and attacks Kanemitsu. He declares that all ayakashi are harmful beings that must be extinguished.