Pheles Academy is a prestigious boarding school that is glamorous and free, but with strict school rules. However, there was a secret in this school that must not be revealed.

Uno, a fallen angel who transferred from heaven, Chris, half cat and half demon, March, made of green apple flavored gummy bears, and Yongjin, a shy boy with octopus tentacles. These three unique characters are enjoying their youth, but eventually they open the door to their own world.

The door opens into a strange, alien space that is neither reality nor a dream. Endless white corridors, distorted classrooms, giggling cats.... What will happen to them in this gradually distorting world? What is the secret hidden in Pheles Academy? And will they be able to graduate safely?