Seitokai Yakuindomo OVA (Sub)
Watch Seitokai Yakuindomo OVA full episodes online enghlish sub
Synopsis: It is the start of Takatoshi Tsuda’s second year as the put-upon vice president of the student council and his sister Kotomi is entering school as a first year. New friends and double entendres are made.
More info: Myanimelist, wikipedia