Azure Night, Waltz of Rapture

Azure Night, Waltz of Rapture summary: Seoyoon goes to a piano recital and ends up in a nightmare world of terrifying creatures. She meets Heewon, a charming "superbia," who reveals that she is a mere food source for these sinful beings. Seoyoon is forced to be devoured by vampires and incubi in order to survive. Will she be able to escape the darkness and horrors of this realm, or will she find a reason to remain in this sinister world?