Seitokai Yakuindomo

Synopsis

"I applied here since it's a close walk from my house. But it's really full of girls, huh?"
In this 4-koma series Tsuda Takatoshi is a new student in the formerly all-girls, and recently gender-integrated high school. He's asked to join the student council as the vice president. Thus begins his days as the only normal boy among 3 overachieving female student council officers... who have some interesting quirks, to say the least.

Synopsis & details from MangaUpdates