Lin Yun, the male lead, is a freshman at Jiangcheng University. Lean and tall, often wearing a roguish grin, he may be dressed in old clothes, but he is neither humble nor arrogant. On the first day of school, he binds to a “cashback spending system” and receives a top-spec Kawasaki H2. Clear about gratitude and grudges, he uses cashback to rise against the odds and slap down those who look down on him. Domineering to outsiders yet fiercely protective of his own, he is a handsome bad-boy type who excels at hiding his strength.