My Friend's Little Sister Has It In for Me! (友達の妹が俺にだけウザい, Tomodachi no Imōto ga Ore ni Dake Uzai) is Japanese light novel series written by Ghost Mikawa and illustrated by Tomari. The series began publication by SB Creative under their GA Bunko imprint in April 2019. The light novel is licensed in North America by J-Novel Club. A manga adaptation by Hira Hiraoka began serialization online in December 2019. An anime television series adaptation has been announced.