The Bookmark of Demise (終焉ノ栞, Shuuen no Shiori)
Type: Vocaloid Song Series + Novel + MangaCreators: 150P (Composition), Suzumu (Writing/Lyrics), Saine (Character Design), Komine (Illustration)
A-ya, a high schooler immensely bored by the endless mundanity of daily life, discovers an old diary with instructions on how to summon the Bookmark of Demise, held within a book said to contain every urban legend in the world. In order to break free from boredom, he draws himself and his clubmates into the worst Demise Game.