Anime: Completed
Game: PS Vita

Genre:
Romance, Musical, Harem, Supernatural

Plot:
Ritsuka Tachibana, a seemingly normal school girl suddenly finds herself become entangled in a conflict between devils and vampires at her school, with both sides believing she is the last remaining key to discovering the location of the forbidden grimoire, a powerful item that will give mastery over the world to whichever side obtains it first.