The Wishing Stones
Shōko returns to Japan, and soon meets Karada and Hiro. They and their friends goes to the beach. After seeing Shōko's silence in front of Hiro, Tōko asks what was wrong. Shōko responds loud and when Karada tries to solve the matter in between them, Shōko tells her that she is very small for that. Hiro buys Karada some Hair Ribbons and for suggestion she goes to Shōko. She responds again ending up that Karada is childish. Karada gets humiliated and is soon cheered up by Tetsu. When Hiro and Shōko talk in private, Shōko slaps him and runs away. As soon as the moon shines, Karada grows into an adult as Shōko grows younger into a child.
Aired 06/10/2006EP 1 - The Wishing Stones

Living for the Day After Tomorrow
There are far worse things than having to deal with your ex-boyfriend's little sister or your older brother's ex-girlfriend. But that's something Karada Iokawa and Shoko Nogami have to learn the hard way when a magic wishing stone inexplicably grants Karada's wish to be older - and does it by stealing the years from Shoko! Now Shoko, who's already graduated and studied overseas, is Karada's age, just about to enter junior high school. Meanwhile Karada must suddenly face the real facts about what being grown up entails. And just to make a bizarre situation even more awkward, there's the issue of how to handle their existing romantic interests!
(Source: RightStuf)