The class competition at the Katsuta Festival is "Keidoro," where three people from each class participate. Takeshi Hikage, the student council president, boasts overwhelming fighting ability as the successor to Hikage-ryu ninjutsu, and aims to win the championship for the second year in a row. Naka Hikage, Yuki's classmate and Takeshi's younger sister, joins Yuki and her friends in gathering information in hopes of winning and gaining recognition from her brother. Naka, who has undergone rigorous training with his brother, has no friends. Naka musters up his courage and tells Yuki that he wants her to be his friend.