After appearing in the Prism King Cup representing Edel Rose, and getting a glimpse of what it was like to a be a future Prism Star, Ichijou Shin entered Kakyouin Academy's High School division in spring and became a first-year high school student. Kouji, Hiro, and Kazuki from Over the Rainbow left Edel Rose and established a new agency.

Meanwhile, after having the title of Prism King stolen by Hiro, the leader of Schwarz Rose, Norizuki Jin, proposes PRISM.1, which would decide a new king other than Prism King. He then announces that Schwarz Rose and Edel Rose will be competing with each other.

Source: Crunchyroll

Note: The movies were later broadcast on TV in 2019 Spring season as 12 episodes, 3 episodes per movie. The TV broadcast started on 09.04.2019.

AniDB | ANN | MAL (2) (3) (4) (5) | TVDB | Wiki (en)

Prequel: King of Prism: Pride the Hero
Other: King of Prism: Dramatic Prism.1