Kamikamikaeshi Vol. 6 (Kodansha, 2018)

Mashiro and Hayate head for the sealed mountain looking for the key to stop the Kamitsuka family. At the mountain, for the first time in 13 years, they see Mashiro's mother, the previous miko, and Hayate's father who is serving her. However, Mashiro's mother, Aoi already used up her power as a miko and has kept on sleeping for the past 13 years. Meanwhile, the Black Miko sets her sights on Takemika… As the kamisama's hidden past and darkness within the Kamitsuka family is dragged into the light, the wheel of fate begins to spin!