Tsugumomo

Kazuya Kagami's mother passed away, but he has kept her obi with him always. This obi, however, is no ordinary accessory - it's home to a tsugumomo named Kiriha, a mature spirit that has developed a strong bond with Kazuya's mother. When a wig amasogi attacks Kazuya, his obi transforms into Kiriha, a beautiful girl who saves his life. Kiriha's arrival draws Kazuya into a world filled with supernatural beings and gods, forcing him to adapt to a reality he never knew existed.