Many children mysteriously disappear in 2005. This is called it the "Reasal Phenomenon." A few children came back with tails on their behinds. One of them was Hana Yamaguchi. Hana calls upon children with tails and creates the "Macro Cosmic Invincible Legion of Kids."
These children can go freely back and forth from one world to another and with such special powers, they save missing children. But then, the Ali Troops invade this world. This is a fascinating science fiction drama about the wonders of the universe.
--Kodanclub.com

From CPM:

In the future, alien invasion is a daily occurrence and everyone must be prepared. Elementary School #9 has assigned three students to fight off the extra-terrestrial threat.

From CPM: The girls have finally graduated 6th grade and are now in Junior High… but are they really prepared for the challenges that await them? There's a new girl in town and she seems to be hosting an entirely different kind of alien… is she a new ally, or will she be the Earth's latest threat?

A tale about people who have to shoulder the burden of mankind’s progress…