All UFO Princess Valkyrie released episodes
Valkyrie accidentally turns the switch on in the spaceship and it begins to go haywire.
Valkyrie crashes on Kazuto, and gives him half of her soul. She goes to live with him but Akina and Rika do not approve. Hydra comes to Earth to bring Valkyrie back to Valhalla.
The head catgirl maid for Valkyrie, Sanada arrives on Earth. She sees the relationship between Akina and Kazuto, and decides to try to break up the relationship by turning Akina into an obedient catgirl maid.
Prince Triam comes to Earth to look for Valkyrie. He finds out that Valkyrie has turned into a child because she gave half of her soul to Kazuto, and so he tries to take that half back from Kazuto.