Ebiten: Kōritsu Ebisugawa Kōkō Tenmonbu (えびてん 公立海老栖川高校天悶部, lit. "Ebisugawa Public High School Astronomical Club") is a comedy manga series by Kira Inugami and SCA-ji, serialized in Kadokawa Shoten's Comp Ace magazine. Three volumes have been released as of June 2012. 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. The series has been licensed by Sentai Filmworks in North America.
Noya Itsuki just started his school year at the Ebisugawa High School and since he has always had a fascination with space, he decides to join the astronomy club. However, he mistakenly walks into the all girls Otaku Club. He notices that the members are really weird, but Itsuki has yet to realize that he isn't in the astronomy club. His life is about to get complicated by being surrounded by so many girls.