Yoseob was your typical player in school. He had all the girls swooning over him. He might as well have been the professional athlete, but he had the brain's too. He had every girl confess to him except one. That one person was Luna. She was smarter than him when it came to school academics. She was an average looking girl who didn't stand out much. But when Yoseob's friends make a bet with him, will he fulfill it? Or will he end up hurting Luna as soon as they encounter one another?