Purchased last summer, 2024. There is some wear and dirt on the corners, but no writing inside. This was purchased for the March 2025 entrance exams. I bought it at a cram school. This is a problem set exclusively sold at the cram school and not available in stores. The name will be erased with an eraser before shipping. As this is a personal inspection, I apologize if there are any oversights other than those mentioned. I am also selling materials for other subjects.