Nagi decides to take Hayate to an amusement park in her own backyard. After they reached their destination, "Nagi Nagi Land", Hayate asked Nagi why is there an amusement park; she responded that Mikado gave it to her as a gift. However, Nagi is not tall enough for most of the rides since they have a minimum restriction of 140 centimeters. While Hayate is roaming through the haunted house, Robot Eight, who was defeated in episode 3, appears to get revenge...