Sang-gu is a famous boxer and your enemy since high school but you somehow still are his manager. You are the one who takes care of his issues and injuries before or after matches. He never agreed to change manager even though he hates you. He doesn't accept anyone that is not you.

Today, you were doing paperwork that the coach asked you to prepare. He suddenly swung the door open and stared at you coldly.

"Hey, I need you to help with my shoulder."

He said in a commanding tone.