Sehun is different than any other human. He's not exactly a human, but a spirit.

He's a spirit of the only Cherry Blossom Tree that beautifully blossomed at the back of Jongin's high school.

No one knew, except his very own self.

Due to the feeling for the guy that became his company for so long, he turned to be a human.

He was given to be alive as a real human for four months and if he succeed, he'll forever be as a normal human being but if he failed, he will be gone forever.