My One-Hit Kill Sister is a Japanese web novel series written by Konoe. It was serialized online on the user-generated novel publishing website Shōsetsuka ni Narō from December 2019 to June 2023. A manga adaptation, illustrated by Kenji Taguchi, was serialized online via Shogakukan's Sunday Webry website, as well as the seinen manga magazine Monthly Sunday Gene-X, from March 2020 to July 2023. It chapters were collected in twelve tankōbon volumes. An anime television series adaptation by Gekkō aired from April to June 2023.

Sora Tokui is a Japanese voice actress, singer, and manga artist who made her debut as a voice actress in 2009 as Himemiya in Weiß Survive R.