Gakko ja Oshierarenai!

Aida Mai is a woman in her third year as an english teacher at a private all-girls high school. Due to declining enrollment, the school decides to admit its first male students. Those five freshmen initially feel they're in paradise, but the concerned Mai tries to help them adjust by creating a social dance club and inviting five girls. Those ten students become the focus of the drama, which is described as a story of love and adolescence.
(Source: wiki.d-addicts)