The special edition bonus booklets from volume 9 (left) and volume 14 (right) of "Makai Ouji: Devils and Realist" are both not for sale. The left booklet, "Mune-kyun Love Lix School," is structured like a novel version of an otome game. The right booklet, "Weekly Tenkai," is designed like a weekly magazine, as the name suggests. I think you can enjoy them because they have different tastes. Both have been stored in a place away from direct sunlight.