Kindaichi Shounen no Jikenbo EP59 - Site of Demon God Murder Case File 4

Hajime reveals that the next page on the calendar from which Soga tore the pages was the month of March, which in ancient Japanese revealed Yaoi Muranishi as the killer. He then reveals the location of the artefacts through an arrangement of mirrors in the mansion and finds them hidden inside a stone statue. Muranishi explains that Kyouko manipulated Shiro Munakata into marrying her, but she feared he would leave her after finding the artefacts so she destroyed his research. Muranishi and Munakata then became lovers, but when she became pregnant Kyouko noticed her betrayal. They fought and Kyouko fell down the stairs and died. They hid her death, and Munakata wore a veil and pretended to be the reclusive Kyouko. When the baby was born, they pretended the baby was Kyouko's daughter. However when Munakata heard Yamato and Soga say they caused Shiro's death, she plotted to kill them as she was ill and only had six months to live. Munakata grabbed the blade artefact and attempted to kill herself but she was struck by lightning. Back in the present, the trio arrive at Majin Village and are welcomed by Satsuki who explains that Yaoi Munakata died ten days earlier after living for six months in a prison hospital, however they enjoyed that brief time together.