High school student Haru Yoshioka is bored with the monotony of life. One day, she saves Prince Lune of the Cat Kingdom from being run over by a truck. As a token of gratitude, the Cat King sends her "presents" and invites her to the Cat Kingdom to become Lune's wife. Haru's inability to properly communicate with the cats leads to the misunderstanding that she has accepted the proposal.

As Haru ponders on ways to escape the predicament, a mysterious voice instructs her to search for the Cat Bureau. However, not long after she finally arrives at the bureau, a horde of cats swarms in and forcibly takes her to the Cat Kingdom, along with a member of the Cat Bureau. Concerned for their safety, owner of the Cat Bureau, Baron Humbert von Gikkingen, follows close behind.

The more Haru immerses herself in the activities of the Cat Kingdom, the more cat-like she becomes. To her dismay, she soon learns that, unless she can find her true self, she may become a cat permanently. Haru's adventures in the world of cats lead her down a path to self-discovery, allowing her to return as a more confident person.

Calamities are plaguing the land of Earthsea and dragons have been seen fighting above the clouds—something which has never happened before. Sparrowhawk, a powerful Archmage, sets out to uncover the mystery behind these concerning events and meets Prince Arren along the way. Arren is the fugitive heir to the Kingdom of Enlad and a seemingly quiet and distressed lad. Wandering aimlessly in an attempt to escape the dark presence haunting him, he decides to tag along Sparrowhawk on his journey.

However, their arrival in the seaside settlement of Hort Town is met with unexpected trouble—Lord Cob, a powerful evil wizard obsessed with eternal life, stands in their way. Forced to confront him, the pair joins forces with Tenar—an old friend of Sparrowhawk—and Therru, the ill-fated orphan girl she took in. But the enemy's cunning hobby of manipulating emotions may just prove to be catastrophic for the young prince.

Set in a magical world, Ged Senki goes beyond the classical battle between the forces of good and evil, as it explores the inner battles of the heart.

A goldfish sneaks away from home and floats off on the back of a jellyfish. After getting stuck in a glass jar, she drifts to the shore where she is freed by Sousuke, a five-year-old boy who lives with his mother Lisa in a house by the sea while his father Koichi works on a fishing boat. After healing a cut on Sousuke's finger by licking it, the goldfish is named Ponyo by her new friend.

Unknown to Sousuke, Ponyo already has a name and a family. Her father Fujimoto, a sorcerer who forsook his humanity to live underwater, searches frantically for his daughter Brunhilde. When found and captured, Ponyo rejects her birth name and declares that she wants to become a human. Using the power received from Sousuke's blood, she grows arms and legs and escapes to the surface once more. But the magic released into the ocean causes an imbalance in nature, causing the Moon to start falling out of orbit and the tides to grow dangerously stronger. Reunited with Ponyo, Sousuke must pass an ancient test to restore order in the world and let his companion live on as a human.