A friend of Wakaba, Sanae is a weak and shy girl who joins the trip to Kanenone because her doctors believe that the fresh country air will be beneficial to her health. Her need to take medication on a regular basis is highlighted in several episodes.        Sanae has a much younger appearance than the rest of the major female characters. This draws the attention of Tenjin, who has a fetish for "little sister" types. Unfortunately for Tenjin, his unusual and over-enthusiastic advances only manage to frighten Sanae away from him.     Source: Wikipedia

Kanenone Academy was an all-boys high school isolated from the world by mountains and hills. Yusuke Takasaki, the average 11th grader, led a normal life in the academy until the academy announced attempting for co-ed, and high-school girls were being transferred for the summer semester.
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(Source: Anime News Network)

Hanaoka high school is an all girls' school, and the girls were pretty excited when they heard that boys were admitted into their high school. Smart and elegant boys, that's in their fantasy. However, in reality, the boys who were actually admitted are from the countryside and not smart at all, leave alone being elegant. And in fact, two of them are dirty perverts...<br>

Sanae Minami