"Gimai Seikatsu (義妹生活)" is a Japanese YouTube manga by Ghost Mikawa, and a media mix work based on it. Hiten is in charge of the illustrations. In April 2020, a YouTube channel was opened, and this work, which had been posted as YouTube videos since May 2020, was media mixed and published as a novelized version by MF Bunko J (KADOKAWA) from January 2021.