Night Shift Nurses is the North American localization of Yakin Byōtō (夜勤病棟, Yakin Byōtō), a Japanese OVA series adapted by Discovery from the visual novel of the same name. It was formerly licensed by Anime 18, and now by Critical Mass Video. The series is particularly notorious for its explicit depictions of rape, necrophilia, sadomasochism, and paraphilia.