Kaettekita Seitokai Yakuindomo

Name: Kaettekita Seitokai Yakuindomo
Genre: Animation, Comedy, Drama
Released: 2011
Rating: 8.3
Cast: Shintaro Asanuma, Yoko Hikasa, Satomi Sato, Sayuri Yahagi, Yu Kobayashi

Takatoshi's sister starts attending his high school. He attempts to shield her from the blatant anatomical chatter, but usually fails. She doesn't mind.