Kageyama and (m/n) have been best friends since childhood. When they were 10 years old,they were very happy and carefree. It all changed when Kageyama had developed feelings for (m/n). He confessed when they were 12 years old but then (m/n) never got the chance to reply because he transferred to Korea. As they grew older and were now 15, (m/n)'s family was now operating avery successful business. His parents then moved to Japan again to promote their business more.