Due to the family factory doing poorly, Midori enters the collage of “Oedo Women’s Institute” on a full ride. Known as the “Institute to marry into wealthy families”, the institute is a “Super-gentlewoman preparatory institute” that promises their students’ future. To ensure her family’s future, Midori is adamant on marrying a rich boy. But she gets kissed by her beautiful female roommate… And pinned down…!! On top of that, the institute’s true curriculum is to have their students use night time techniques that pleasure men, get impregnated, and get married…!? This isn’t what was promised!!