a Japanese four-panel manga series written and illustrated by Kaduho which began serialization in Houbunsha's Manga Time Kirara Carat from July 2008. It follows the school lives of a high school girl Yasuna Oribe, along with her friends Sonya, a female assassin, and Agiri Goshiki, a female ninja. An anime adaptation by J.C.Staff aired in Japan between January 5, 2012 and March 29, 2012, with an original video animation episode released on October 16, 2013.Yasuna Oribe gets a lot of injuries from classmate and hired assassin, Sonya. When a dog wanders into the classroom, the two think of a way to get rid of it. Later, Yasuna meets a self-proclaimed ninja named Agiri Goshiki who tries to sell her some 'ninjitsus'.