Green Green 2 ~Koi no Special Summer~

This once-private-all-girls school has come across a new dilemma; the very people who forced the school to open its doors to coeducation with boys now is considering closing the school altogether. This divides the student body in half: those who fight to keep the school alive and those who fight to shut it down. You play, of course, as a student caught in the middle--however I believe his growing relationships with some of the girls would lead him to defend the school's existence.

[From White Masq]