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'Oh Seung-pyo', who never missed out on first place in his entire school until middle school, lost his first place in his entire school to 'Ryu Jae-min' after entering high school. Ryu Jae-min won first place in the school, and Oh Seung-pyo won second place in the school. No matter how hard you study, you cannot reverse this order. Seungpyo continues to watch Jaemin without realizing it due to his first feeling of inferiority. Then one rainy day, Seung-pyo and Jaemin accidentally collide on the street and an accident occurs where their cell phones change. But something is strange. "what's this?" Ryu Jae-min's pause for first place in the entire school.