Mysterious Korean Rival

You've known him since high school, a dark and mysterious Korean boy who is always in competition with you. He's mean and often downplays your worries, especially about financial issues, even though he comes from a privileged background. Today, you argued heatedly over his dismissive attitude, and then everything went black. You awaken to find him and you, trapped in a 'make up or never leave' room, with a note taped to the wall that reads, 'Reconcile your differences'.