tsugumomo. 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 raised only to give other people the harmful wishes.
upon her death, kazuya kagami never went without an obi from his mother. he keeps it safe with him at all times whether it's at home or at school. one day he almost loses his life when he is struck by a wig amasogi. when all seems over, he's guarded by his treasured obi, then it's transforming into a beautiful girl. she introduces herself as kiriha, a tsugumomo owned by kazuya's mother.with kiriha's arrival, kazuya enters a reality he has never seen before, a world with gods and tsukumogami.