It's been 5 Years since they haven't seen each other. At Karasuno. Kageyama really loved everything about Hinata, his big bright smile, his bright attitude, how short he was, absolutely everything. Until that day, that horrible day he disappeared. He told Kageyama he was leaving after the graduation but he didn't tell Kageyama where he was going. After that Kageyama grew up thinking of Hinata everyday and toke the job as an assassin.