Hen Semi(変ゼミHen Zemi), also known as Abnormal Physiology Seminar, is a Japanese comedy manga series written and illustrated by TAGRO and is a remake of his earlier manga series, Hentai Seiri Seminar (変態生理ゼミナール?, "Abnormal Physiology Seminar") . Hen Semi has been serialized in Kodansha's Morning 2 manga magazine since 2006. It has been adapted into an original video animation in 2010, as well as a anime television series in 2011.