Decision. Finally, "he" began to move. The mist covering Mimei City becomes a barrier that cuts off communication with the outside world, and the entire "Deidaraboch" Ayakashi wanders through the mist. Deidaraboch, a giant who can be mistaken for a mountain, has just walked, destroying the city and trampling people. And even positive love will be sacrificed. Yu and her friends fight against this desperate enemy to save the people of the city in order to take the grace of joy.