A comedy manga series, adapted into an anime in the summer of 2012. Itsuki Noya is just starting his school year at Ebisugawa High School. Always fascinated with the stars, he decides to join the school Astronomy club(Astronomy Club (天文部 tenmon-bu). Unfortunately for Noya, he winds up in the Astronomical Club (天悶部 tenmon-bu) an all girl Otaku club, consisting of loudmouth and bossy president Kyoko Todayama, Hakata Kanamori, a Fujoshi
frequently on the receiving end of Todayama's sexual harassment antics, The Stoic
Rikei Hiromatsu, Hasumi Oba, the kindhearted Vice President, and their adviser...a cat named Omori. Stuck with them(and stuck in women's clothes) Noya must endure the craziness he has stumbled into.
The series is currently streaming on Crunchyroll.