The series opens as a brave knight defeats an evil looking entity, while surrounded in a fiery sea of flames. Making short work of his foe our hero looks up to the stars and sees something fall into the forest. When he finds the mysterious object he is shocked to discover that it was a baby girl! As he gazes at her his eyes seem to fill with love for this little girl and thus our hero adopts her as is she were his own child. Flash forward seventeen years into the future and Yucie is now all grown up…or is she? It seems that when she reached the age of 10 her body stopped growing beyond that point and so she ended up looking much younger than she actually is. Whether this is some kind of spell put on her or a strange physical ailment is unknown. Today as it turns out is her birthday and her dad has as usual prepared a gigantic feast for his daughter. Unfortunately Yucie doesn't really enjoy the large meals her dad traditionally cooks on her birthday, but she doesn't have the heart to te

It's Yucie's first day at the Princess Academy and just as things were looking good Lady Glenda the Princess of the Demon World makes her big entrance. Her goal? To rule the world by using the Eternal Tiara as a way to wish and gain complete control of the planet! Like Yucie she also finds herself stuck in a body that is physically much younger than she is in reality. Despite sharing this situation with Yucie the two quickly become rivals and end up pitted against each other in a contest that will decide who stays and who leaves the Princess Academy! Who will win!?

As part of their training to become the Platinum Princess each of the students must take up a part time job so that they can interact with people they typically would not run into in their everyday lives. As their first assignment Yucie, Cocoloo and Glenda take up helper positions at a nearby confectionary shop. What will happen when all three girls end up working together!?

As their second job assignment the girls end up with the task of babysitting some babies, but when Yucie discovers that she will be in charge of a strange non-human baby will she be up to the task?

Yucie takes on her most challenging part time job yet as she joins a flower garden and is put in charge of helping grow this season's flowers. This may be too hard for our petite princess! Hang in there Yucie!

Yucie is sent off to watch a church overnight while the residing sister is away, she ends up having Glenda show as well as Cocoloo. Glenda ends up leaving on Demon related business but the two girls stay and eventually have to deal with the arrival of a tired young man seeking refuge. There's concern all around until the young man actually wakes up and acts like king of the castle and keeps referring to Yucie as Forehead. As it turns out, for some unknown reason he's on the run from the castle guards who won't say why they're after him. The actual sister of the church opts to take care of him until he's ready to go, which doesn't take long as he's after the local dragon. Finding that Yucie knows about him, she's dragged deeper into things but there's something about him she can't quite shake. The episode plays out much like a good fantasy episode with dragons, cerebeus and big fight scenes, but for Yucie she finds herself feeling like she did when the prince years ago rescued her in th

Yucie and Glenda are sent off to find the next crystal flower. With the help of Gaga, the two are sent into the Demon World where they have to work together and figure it out with no real help. For Glenda, returning to the Demon World puts her firmly in her element, but not as she'd like. For Yucie, it's seeing all those things you normally fear being brought to reality. Unfortunately for both, the Demon Realm isn't what it used to be by a long stretch. One of the reasons Glenda wants to take over in this world is that her father is set on a remodeling project of the entire world that'll make it more tourist friendly. So things like the evil looking range of mountains have blue bows and candies across it. The sky has pastel flowers littered through it. It's just far too cute. And even getting to meet the lord of the demon world is amusing since he's thrown his back out while doing all the redecorating.

Glenda, Yucie and Cocoloo are working in the library with Rosa for a while; Glenda seems to think the glasses she's wearing make her look more mature. While Yucie is off on her own she runs into Arc who is looking for something and seems to be being hunted down by Rosa. Will Yucie and her friends go against a facilty member and help Arc escape?

Yucie, Glenda, and Cocoloo are getting a little overloaded from all their oddjobs and Cube, always being the caring guy he is, arranges for them to go on a vacation. When their fun is just beginning, Yucie finds a mystery girl who has a fascination with the water. Just who....or WHAT....is she?

Glenda is acting quite unlike her regular aggressive self, she's IN LOVE! It seems a young man has been able to melt the Princess of Hell's heart and she is willing to do anything it takes to become his wife, but are her dreams just that? Yucie and Elmina seem to think so after they make a discovery about Glenda's crush.

It's a special time in the villiage Yucie and her friends live in, it's a bit like halloween; Glenda dresses up like her mother, Cocoloo dresses up like an angel, Elmina doesn't dress up at all, and Yucie dresses up as a cat. The festival doesn't start for some time and yet, who should show up but Arc? Remebering what happened between them, Yucie, with some last minute encouragement from her freinds, tries to tell Arc how she feels about him.

When an odd job proves too dangerous for Yucie and the other girls, Cube and Gaga go down into Hades, the land of the demons. But soon they find themselves outnumbered by an army of robots and even Glenda is worried for the traitors life as well as the life of Gaga. Barizan falls ill and, since the girls can't do anything about it, Cube recruits himself, Chowy and Gaga to go inside the robot from heaven. Once inside, Cube and his team meet an old ""enemy"" and some mini enemies. Just how will this end?

The girls who hae now found all of the Crystal Flowers, insert it inside the hands with the Spiritual World. Five people inform about a crisis about the Fairy Boundary. But there's a creepy tree that's blasting the world there.

Everyone figures out Yucie's new wish is to save Arc. They chose to let Yucie have it, but will Yucie accept? Especially after Queen Ercell arrives to tell them that there is a price that the losers must face. Will Yucie still agree to become the Platinum Princess after she learns of this?

Yucie, now the Platinum Princess, rushes to save Arc. Soon after it's discovered that her memories of her now-lost friends have been erased...or have they? Yucie soon realizes that she has lost something important, something precious to her. She just doesn't know what that is. Will Yucie be able to get get back what she lost?