Sky's father, a respected mafia boss, hires Sun to to be Sky's bodyguard.  To maintain a sense of normalcy in his life, Sky demands that Sun pretends to be his cousin to avoid others learning about his father's mafia connections.

After Sun is injured in a brawl at the school it is Sky's turn to take on the role of caretaker.

Sky plans a special day for Sun to express his gratitude for Sun saving his life.  The day is a rare moment of entertainment for Sun who has spent his life serving others.