rou-kyuu-bu!
A 2009 light novel series written by Sagu Aoyama, with illustrations by Tinker Bell. Also adapted into a manga by Takami Yuuki, serialized in ASCII Media Works' Dengeki G's Magazine, a 4koma serialized in ASCII's Dengeki Moeoh, by Miwa Futaba, a 2011 visual novel for the PlayStation Portable, and 2011 anime by Project No.9 / Studio Blanc.
The story centers around a high school freshman, Hasegawa Subaru, who somehow ends up as a coach of an elementary school's girls basketball team.