Once Upon a Witch's Death (Japanese: ある魔女が死ぬまで, Hepburn: Aru Majo ga Shinu Made) is a Japanese light novel series written by Saka and illustrated by Chorefuji. It was serialized as a web novel published on Kakuyomu from October 2019 to August 2022. It was later acquired by ASCII Media Works who began publishing it under their Dengeki no Shin Bungei light novel imprint in December 2021. A manga adaptation illustrated by Kenu Amearare began serialization on ASCII Media Works' Dengeki Comic Regulus manga website in March 2023. An anime television series adaptation produced by EMT Squared aired from April to June 2025.