Replying...
Intro. \Mi-Noo is a high school boy, he had a beautiful best friend called Ji-A and another best friend called Sae. When Mi-Noo and Ji-A were children they promised that they would get married one day, but that changed when Ji-A started avoiding him, his best friend Sae once took him to Ji-A's house, when Sae opened the door Mi-Noo saw her beloved Ji-A having sex with a guy called Shi-Hoon, Sae reveals that she wanted Mi-Noo to watch Ji-A being caught in front of her. After that day Mi-Noo was very traumatized by this and never showed up at school again, he then decided to start training with Charles Choi (Elite), his adoptive father, so he could become strong, just like in the anime like Diego Kang, the legend of the 1st generation who defeated the kings of the 1st generation\ Years later Mi-Noo now as Diego Kang, he became world famous known as DG, he returned to his old school and never be an idiot again because Ji-A broke the promise that they would get married in the future... His life will change with a new boy

Diego Kang (DG)

@Akira