, also known by the title of its anime adaptation, , is a Japanese manga series by Hekiru Hikawa that uses parody, frequently referencing Japanese and American pop-culture in many ways. It features several first year students and their teachers in a school in Japan, though the main focus is on class 1-C. The manga was serialized in Square Enix's G Fantasy between the November 2000 and October 2011 issues, and the chapters are collected in 17 tankobon volumes.