The TV anime series Hen Zemi is based on TAGRO's "abnormal comedy" manga also known as Abnormal Physiology Seminar, which was first adapted as an OVA in 2010. In the story, Nanako Matsutaka has been assigned to the Abnormal Physiology Seminar, even though she herself is a rather ordinary person with no abnormalities in particular. On the other hand, her classmates, including the college upperclassman Komugi Musashi, have just about every abnormal condition to speak of. (based on ANN synopsis)