(anime), Shin-ichiro Miki (drama CD) Hibiki's father. Similar to Narumi, he doesn't like ghosts, and the relationship with his wife supernatural ability made his hair turn prematurely white over a short duration of time. (anime), Sumire Uesaka (drama CD) Narumi's younger cousin, whose father died. Kenta's older brother who works as a police officer. He has a crush on Kyōko, whom he had previously encountered during her delinquent days. Ghosts (anime), Kenyu Horiuchi (drama CD) The ghost of a samurai who died of hunger. After Amami gave him food, he started to protect her and do anything for her in any way he can, such as answering to teacher for roll call when Hibiki falls asleep in class. (anime) A spirit who haunts one of the stalls in the school's girls' restroom. (anime), Norio Wakamoto (drama CD) A cute but perverted cat that is constantly trying to peek on girls' panties, though is often thwarted by the ghosts protecting Hibiki. (anime) A ghost with long grey hair who haunts others, usually Kana, through phone calls. (anime), Aimi Terakawa (drama CD) A ghost girl who is dressed in the kogal style. She initially possesses Hibiki in order to make peace with her mother, but chooses to stick around. She appears to have a rivalry with Roll Call Samurai. (anime) A ghost girl in a sailor uniform who carries a red umbrella, which she offers to those who need shelter from the rain. She has no neck in the manga and no face in the anime. (anime), Nobuo Tobita (drama CD) A jibakurei that protects the local park, bound to the sign at the entrance. His figure is never seen. (anime), Kyōko Hikami (drama CD) Hibiki's late mother, who died when Hibiki was born. While alive, her sixth sense was said to be much stronger than her daughter's, and occasionally made prophecies with her ability. She currently resides within Hibiki's memories, looking after a flower giving Hibiki her sixth sense. The spirit of Inoue's grandmother who is constantly watching over her. Media Manga The original manga by Hinako Seta was first published in Houbunsha's Manga Time Jumbo magazine in the December 2009 issue, and went onto serialization from February 2010. An anthology comic was released on May 7, 2015. It moved to Manga Time for the May issue on April 7, 2018 when Jumbo was discontinued. Twelve tankōbon volumes have been released