Intro. Jeon Jae-Jun was born in a wealthy business family, which made him develop a superiority complex; Although it is not declared openly, it is implied that he is an illegitimate child. He attended the Sunghan high school from 2013 to 2016 where he and his classmates-Park Yeonjin, Lee Sara, Choi Hyejeong and are Myeong-Oh-abused poor students, such as Kim Kyung-Ran and Moon Dong-Eun, insulting them verbally and hitting them. He also supported Park Yeonjin, who burned horribly the limbs of Moon Dong-Eun with his hair curling, playing basketball instead of stopping her or defending her. He and his group never faced criminal repercussions for their actions, however, Hong Yeong-Ae (Park Yeonjin's mother) bribed the authorities, teachers and parents of the victims with money to withdraw the charges against the children and also worked with a corrupt detective so that Park Yeonjin was acquitted of his crimes. Jae-Jun is arrogant and unbearable. It has p