Saji Amahiko vowed never to play sports again. At the end of his middle school years, during the summer baseball state championship, he pitched 4 balls and walked the batter when the bases were loaded and lost the game for the entire team. Unable to recover from that trauma, when he entered high school, he promised himself to never compete in any sport that makes you face your opponents to determine a winner and loser.
His teacher and also his cousin, Ms. Misato, forces Amahiko to join the archery team at school thinking that it might help overcome his fear of sports. Archery is a sport where, although you do compete against other players, the main opponent is yourself. If you are able to overcome the negativity inside you and win against yourself, you will be able to hit the target. Initially, Amahiko was unable to hit the target because of the demon inside him, but when he was able to face his mistakes and own up to it, he turned out to be an archer with a lot of potential. From that day on, he changed his vows to never lose against himself ever again.