As the story begins, the three riders transform to fight Orphenochs. Mari catches up to them as the fight concludes and begs Takumi to return home with them. He returns home with her. Lucky Clover wants to recruit Yuka as a member. She is strong and has the potential to become stronger. Yuka, Naoya, and Keitaro volunteer with the kids at an orphanage where Teruo, the boy Naoya saved, lives. Strangers warn the police to quit investigating the “incidents” because they are accidents. Meanwhile, those same strangers continue to follow Yuka and her friends as they head to an amusement park. The strangers seem to be conducting experiments of some sort. Keitaro tries to make a move on Yuka and gets rebuffed. She runs off and is followed by one of the strangers. She is approached by Lucky Clover and is forced to fight to show her strength. Masato and Takumi come to her aid.

The strangers are a part of the police department. They are conducting experiments with the idea that the human component can be extracted from the Orphenochs allowing them to kill the monsters. Yuji and Takumi decide to talk to the police. They believe they can convince them that not all Orphenochs are bad. Mari is afraid that she will eventually become an Orphenoch because of the Smart Brain experiments. Masato assures her that the experiment was a failure. Yuka turns herself into the police in hopes of keeping her friends safe. She is brought to the secret research facility. Takumi and Yuji meet with the police and offer to trade themselves for Yuka. An Orphenoch already at the center rescues Yuka. Takumi and Yuji come upon them and allow the Orphenoch who helped to escape. After Takumi answers Keitaro's call, Yuji and Yuka are surprised by the police. The show concludes with Takumi defending the Orphenoch who saved Yuka.