Thank you very much for considering this purchase! This is a bonus for theatergoers of "Demon Slayer: Kimetsu no Yaiba - To the Swordsmith Village - Chapter 1: Akaza's Return"!!! It's a limited edition of 1 million copies, featuring a message board in A5 size with a thank you message and an illustration of Kocho Shinobu drawn by the original author, Koyoharu Gotoge!!! Thank you very much!