Super Seisyun Brothers

Super Seisyun Brothers (SSB ―超青春姉弟s―, SSB ―Sūpā Seishun Burazāzu―) is a Japanese slice of life comedy manga series written and illustrated by Shin Shinmoto. An anime television series adaptation aired on TV Tokyo between September and December 2013.

Plot
The story involves two pair of teenage elder sisters and younger brother, the Shinmoto's who are a bit narcissistic and the Saitou's who look a bit mysterious. It follows their everyday life in school and at home.

Official

 * Official website

Other Sources

 * Wikipedia
 * Anime News Network