This is one red book (Akahon) for Doshisha University. Science-oriented faculty individual schedule. Price: 2,200 yen (excluding tax). Contains past exam questions from the past three years, 2020 to 2022. It's sufficient for use as a past exam question collection. I checked it briefly, and I don't think there are any markings. Please refrain from purchasing if you are concerned, as this is a layman's inspection.