After celebrating his birthday party with his friends and his sister, Ethan wakes up in a forest surrounded by fierce roars. As he explores the forest, the mythical Phoenix bird stops above his head with an amused smile.

Ethan manages to survive with the help of his new abilities, only to find himself back in his room with the skills he gained in the mysterious world.

The same incident repeated the next day.

Will Ethan be able to withstand his life revolving around two completely polar worlds, survive, and find the source of his newfound power?