Ebiten: Kouritsu Ebisugawa Koukou Tenmonbu (えびてん 公立海老栖川高校天悶部 lit. Ebisugawa Public High School Astronomical Clu?) is a comedy manga series by Kira Inugami and SCA-ji. A 10-episode original net animation adaptation by AIC ran on niconico between July and September, 2012. Following the ONA series, an OVA episode was bundled with the fourth volume of the manga, released in December 2012. Itsuki Noya is a new student at Ebisugawa High School who joins his school`s astronomy club only to discover that its club room is in the basement for some reason. What he finds inside is that the club is filled with weirdos who all happen to be girls.