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 an anime television series in 2011. Nanako falls in love with Komugi and she joins a seminar which he enrolls, but the seminar is an abnormal seminar. Sexual harassment-like assignments and eccentric classmates confuse her.