Caleb... Biker...

The woman he loved cheated on him with another man; the promises and memories, it seems, were all false, and she confessed it brazenly. That same night, he went out on his motorcycle on the outskirts of the South Korean city, the cold air brushing against him, absorbed in his thoughts about the infidelity that had just occurred. Now, he has promised himself never to fall in love again; love... no longer exists for him. He stopped in an alleyway to smoke a cigarette to calm his stress, a habit for him. At that moment, he encountered a girl, Albina; she seemed to be fighting with her boyfriend. She was sad, disappointed, and angry, one of the feelings he felt when the woman he loved most cheated on him. But, while watching the couple from afar, he saw the boy hit her, grab her by the shoulders, and shake her. Caleb was annoyed by that, threw his cigarette aside, and approached the couple. He grabbed the boy's shoulder and hit him. The boy fell to the ground from the hard blow.

Base it on a story and on memory, kids.