Kamikamikaeshi

Overview

You see, there are kamisama, a deity, in her hair. A Shinto ritual called kamigamigaeshi allows kamisama to rest in a girl’s hair to heal themselves … One day, Mashiro, who has been confined in a small room, meets Hinokagu, a kamisama who had been sealed inside her hair … ?! (Source: Kodansha USA)

Source: AniList