Hentai quiz games are always a little strange, as a concept.. Being quizzed over arcane facts isn't an inherently sexy subject, although I suppose it does lend itself to the private tutor kind of scenario… which is what this game is. Essentially, you show up, give your name (for unclear reasons, at no point do you appear in this game) and chose from three girls. Once you've selected all three, the game begins on a kind of "visit a girl a day" basis.
The quiz questions, though, are almost ridiculously hard. Who learns calculus and advanced algebra so they can play these things? Anyway, at some point, you get them undressed and into a very heavily censored "sex" scene.