Thank you for looking! This is a set of the "Learn with Vocaloid" series, useful for music learning. It has been stored in a dark place, so it is in relatively clean condition. Please check again if you are sensitive about condition. ☆ Please check my profile before purchasing. - Set contents: 4 music learning related books - Accessories: Vocaloid project CD - Series name: Vocaloid de Oboeru MUSIC x STUDY PROJECT - Subjects: Junior high school history, junior high school science, junior high school mathematics, junior high school English vocabulary - List price: ¥1600 each (¥6400 total)