L'anime est issu de la légende urbaine liée au fantôme de Hanako, dont faisait mention Toru Tsunemitsu dans un recueil de nouvelles.Hanako est un fantôme qui franchit régulièrement les portes de l'au-delà pour hanter exclusivement les toilettes d'une école. Ses apparitions soudaines et répétées l'emmènent à rencontrer beaucoup de personnes et à animer ses journées.

In the year 2061 A.D., Neo Pro-Wrestling, a form of wrestling that allows for armour and other enhancements, is rapidly growing in popularity. In this, Miku, a young flighty girl is set to join her friends as the tag team known as the Pretty Four. However, the competition is fierce and their opponents are ready to do whatever it takes to win. Against this, the Four manage to obtain the services of an eccentric coach who trained their hero, Aquamarine. With his guidance, the four start on their fight for the top as they must train within almost inhuman discipline while their matches become more and more challenging as their opponents rise in the ranks.

One fateful day, Karin, a junior-high student, found what she thought was an injured piglet. However, the piglet was just exhausted from hunger. After the piglet regained his health by eating Karin's apple, he revealed that he is a prince, Tonrariano III, from a planet called Booringo. Tonrariano wanted to reward Karin for helping him and so he transformed her into a pig with superpowers. Karin was not at all pleased with the gift because she wanted to become a pretty superheroine like "Cutey Chao" (a parody of Cutey Honey), not Super Pig. Reluctantly, she became more interested in her role as Super Pig when she found out that she can turn into someone like "Cutey Chao" if she can collect 108 pearls through doing good deeds for other people.

We begin our adventure by the banks of the Mississippi River, where we see life through the eyes of a young boy named Huck Finn. Huck is a resourceful and spirited lad who knows how to survive on his own. He flees his father, and travels with Jim (a runaway black boy). He learns much about life from Jim. Tom Sawyer is a mischevieous adventure hungry boy who has a zest for life. He's a true romantic at heart, but not above a little trickery to get his own way, or to get out of work. Tom's life really starts to become complicated when he meets Huck. Together with Jim, they begin a series of adventures.