This is sweet and bitter love story of Dejiko who is a grown up. The story begins on the Christmas day. Dejiko or Di Gi Carat is working part-time at a bakery shop. On her way from the shop, she happens to meet a young guy, Senba Taokuo at a park. Then, she meets him again in a town. While Dejiko begins to care for Tako and she’s looking forward meet him again, Takuo drops in at her shop.... Whether will she succeed in love?

When Ryuu is born his tribe tries to sacrifice him to a Tyrannosaurus named Shirano because of the color of his skin. He is however saved by a monkey who raises him as her own son. Meanwhile Ryuu's mother has left the tribe and is out on a quest to find Ryuu. 16 years later Ryuu meets a girl named Ran who was sold to the tribe Ryuu originaly came from. The tribe is not happy to see Ryuu alive and tries to sacrifice him again, this time by burning him alive. Before they can get the deed done the tribe is massacred along with Ryuu's adoptive mother by Shirano. Ryuu then sets out on a quest together with Ran to find his mother and Ran's brother Don.

Marina, the most beautiful mermaid in the royal Merman family, is curious about the human world. One day, she sees a handsome prince on a boat. Suddenly, a storm comes up, throwing him into the sea. Marina saves her handsome prince and guides him to the shore. Marina falls deeply in love and desperately wants to become a human. Despite the hazards, she is willing to risk it all for love.

The OVA will be focus on when Kujaku Nijou first entering group, which occurs one year before the main anime begins.