In Japanese folklore, a tsukumogami is an object that has gained a soul, becoming alive and self-aware. There are two types of tsukumogami: the mature tsugumomo, who have developed through long years of harmony with their owners, and the aberrant amasogi, premature spirits that are only born to grant the destructive wishes of certain people.

Kazuya Kagami has never gone without his mothers obi after her death. Be it at home or school, he keeps it safe with him at all times. One day, he nearly loses his life when a wig amasogi attacks him. When all seems to be over, his treasured obi defends him, transforming into a beautiful girl. She introduces herself as Kiriha, a tsugumomo owned by Kazuyas mother.

With Kirihas arrival, Kazuya enters a reality he has never seen before, a world with gods and tsukumogami.

[Written by MAL Rewrite]