Brand new, unused. Please use it for your studies. A math-only version is also available, so please check my profile if you're interested. If you only want this subject, please comment. If it doesn't sell for a while, I plan to donate it to a local cram school, so those who wish to purchase it, please do so as soon as possible. #Kawaijuku #Hitotsubashi University #University Entrance Exam OP Mock Exam