In junior high school Karin Aiba was really bad at studying and, because of that, she was nicknamed "Baka-rin" (dumb Rin). She doesn't want her high school life to be like this too, so she commits to studying and manages to get into her desired high school! "Finally, my life as a super bright high school student will begin!"... or at least that's what she thought until she got a red mark in her first exam...! While Karin was spending her time depressed in the school's warehouse and was starting to hate school again, she met a mysterious boy who asked her to join his new club, where only people who hate school can enter!