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Daniel grew up with only his mother to take care of him. Since they are poor, they live in poverty while struggling to make ends meet. In addition to his poor living conditions, Daniel is looked down upon by many because of his unattractive appearance. This led to him being a victim of bullying in his school (mostly by Logan).

Unable to stand her son being bullied any longer, Daniel's mother offered him a chance to transfer to a different school (Jae Won High). Daniel, unable to bear with his school troubles any longer, tearfully accepts his mother's offer.

Upon moving to a different location, Daniel's dreams of starting anew are quickly shattered after suffering a humiliating defeat at the hands of Zack Lee, captured on video. With the video going viral, he cried himself to sleep only to mysteriously awaken the next morning in a completely new body, with certain rules:

1. He has to sleep to change bodies

2. If he is forcefully awakened, the other body will go to sleep

3. The sleeping body has to be cared for like an actual body

4. He is conscious at all times (cannot have dreams)

5. In a state of lost consciousness, he cannot change bodies until the other one is recovered.