Princess Strike. Yuka Sasaki, a high school student who came to Tokyo from the countryside, accidentally bumps into the undefeated ace, Chikage, who was competing in the latest "Circle Bout" sports game created by the MR system at the convention center that day. . Chikae invites you to see Yuka who is interested in Circlet Bout, but she decides to play by mistake and fights against Chikage… Yuka gradually shows her natural talent while she is puzzled by the first Circlet Bout Shi…?