On the way to his target audition, Yu, an ordinary high school student, encounters a mysterious carriage and is taken away. When he wakes up, he finds himself in a parallel world called "Twisted Wonderland"!? Yu has enrolled in Night Raven College, a school for training magicians, and has become accustomed to school life. While many students return home for the winter holidays, Yu and Grimm remain at school, and there they meet a student... (Source: Square Enix, translated)