At the far end of the Southern Seas, where none had dared to go, there exists an island called Charanpo Land. At the center of that island is a giant baobab tree, which produces many eggs each day. Inside the eggs are food, clothing, and other daily necessities. The inhabitants of the island live carefree lives, dependent upon the eggs. But lately, more and more of the eggs have been turning up empty, which makes the inhabitants uneasy. Then one day, with a thunderous crash, and an explosion of rainbow-colored light, the baobab tree produces an egg of curious appearance. The next morning, the village chief Poncho tells the inhabitants that they must find that egg. Now the tiger Kometora and a group of children must find the egg within the forest.

Three additional adventures for the Kimengumi and friends. The boys fail their exams right before summer vacation and have to take supplementary lessons. A mandatory school trip to the beach during summer vacation for a swimming competition. Finally school is back in session, the karate club is in danger when a new opponent appears.

Tsuyoshi and his perverted friend Tsukasa stumble upon a time machine while running away from Tsukasa's little sister. Along with the time machine's inventor they accidentally travel 12 years to the past and meet their younger selves along with Tsuyoshi's sister who back then wasn't a violent tomboy like nowadays.