Yotsuya Otsuka - Summary of the Four Subjects: Social Studies Purchased from Yotsuya Otsuka in the winter of 2021. I primarily used it by copying the questions or writing the answers on separate paper while looking at the questions. The question paper has approximately 30 pages with pencil markings, mainly near the question numbers. There is one page with answers marked with a yellow highlighter. I quickly checked the answer sheets and they appear to be unused, with no writing. I will attach photos of the pages with a lot of writing. There are some folds, stains, and stickiness from where sticky notes were attached. There are traces of a name sticker having been peeled off the name section. I apologize if I have overlooked anything. Please consider this item as used. Please refrain from price negotiations. Thank you for looking.