Thank you for looking. This is a set of 10 books: Sanaru Yobiko's Typical Problem Collection and Speed Check for the March 2026 exam. I don't see any writing, but please forgive me if I've missed anything as this is a casual inspection. The cover of Speed Check Vol. 1 Science has a water stain. It's hard to see in the photos, but please check photos 4 and 5. Only the cover is affected; there are no signs of water damage inside. The others show signs of use, but I don't believe there are any noticeable stains or scratches. The condition is marked as "scratched or dirty" to reflect the Science book. This is a used item, so please only purchase if you understand this. Those who are concerned about minor details should refrain from buying. Also, I will refuse buyers who cannot communicate in Japanese (especially those from outside Japan). Please be sure to check my profile (cannot respond to cancellations, complaints, returns, etc. after shipping...). #SanaruYobiko