The Gravity Falls Little Witch Academia Crossover Spectacular

4 Years after leaving Gravity Falls, The Stan Twins have invited Dipper and Mabel back to investigate "The Source of the Weirdness". On the other side of the world, Akko, Diana, and the rest of the group have discovered a horrible secret that threatens the entire world. How are these two events related? And has anything changed between the two groups? Find out inside.