High school student Song Yi-heon chose to jump off a bridge in despair, but fate allowed the gang's second-largest figure, Kim Deok-pal, to save him on the verge of life and death.However, shockingly, a soul exchange occurred between the two of them.When Jin Deba woke up, he found himself in a completely strange world, where the people around him were indifferent and rude.What made him even more incredible was that he was actually brought to the spiritual throne.It wasn't until he came to the cold morgue and saw with his own eyes that his body was cold and lifeless that he suddenly realized that he was no longer the gangster Kim Deok-pal, but the high school student Song Yi-heon who had lost hope in life.

In order to recover his body, Jin Deba is determined to return to the bridge again, hoping to recover his soul in the same way.However, he failed to achieve his goal and instead suffered a serious leg injury as a result of the attempt.Faced with this sudden change, he could only accept this absurd fate and began to try to integrate into this new life.

In the process of adapting to his new identity, Kim Deok-pal accidentally discovered Song Yi-heon's diary during his lifetime.The diary records the bullying he suffered as a high school student and his inner despair.This diary deeply touched Kim Deok-pal, and he was determined to change everything and find the dignity he deserved for Song Yi-heon.

As a result, he began to gradually change his image, cutting off his long hair to reveal the sunny face that was once hidden; he changed into his school uniform and tried to show the youthful atmosphere of a high school student.He also focused on exercising, improving his physical fitness, and studying hard to fit in with this new identity.Finally, at the beginning of school, he appeared in front of his classmates with a brand new self.

However, the shadow of school bullying still exists.The yellow-haired school bully still runs rampant and bullies Jin Depachi.But this time, Jin Deba no longer chose to endure in silence. He was determined to fight against this injustice in his own way.