As Haruto obtains a new Plamonster, the shy Violet Golem, Nito sees a young woman who resembles Medusa and follows her before realizing she walked into a high school. In his search for the girl, Nito ends up causing a disturbance before finding Medusa attacking a trio of school girls. Intercepting her, Nito transforms into Kamen Rider Beast and fights Medusa before the Phantom defeats him and take her leave.