Kim A-rong

Join 4 extraordinary kids as they travel to an alternate Earth where dinosaurs never went extinct, using hi-tech suits and transforming vehicles to protect the dinos from an inter-dimensional villain intent on taking over the multiverse.

Rainbow Bubblegem recounts the magical adventures of seven mermaid princesses who must go to school on land to search for enchanted jewels to save their undersea realm from an evil witch.

After summer vacation, So-ri transfers to a new school and finds an anonymous letter in her desk drawer with an introduction to the school and a clue to finding the next letter. "If you want to keep reading, find my second letter!" While following the clues in the letters and searching all over the school like on a treasure hunt, So-ri keeps running into a same-aged student named Dong-soon. So-ri and Dong-soon quickly become friends as they search for the letters together. As she finds one letter after another, the special connection continues, and So-ri's curiosity grows for the mysterious sender. "I want to find the last letter and thank you in person."