This is a complete set of Demon Slayer, volumes 1-23, the Gaiden (Side Story), and two volumes of the Demon Slayer Corps Sighting Log. There is some yellowing, but they are in good condition and readable. The Demon Slayer Corps set alone is worth around 1500 yen, so it's a great deal. If you've been wanting these, please consider purchasing. Those who only want the main series will get a 1000 yen discount.