Based on the original work by Ken Akamatsu the creator of Love Hina, produced by XEBEC the studio who brought us err.. Love Hina. This anime is not sharing anything in common with the title I just mentioned before except probably character design ;b
In order to protect Japan from mysterious alien invasion, a defense force team has been assembled. But there are no heroes, not even look like one. They are all grade school kids and most of times they caused more troubles than finishing their jobs. But why the defense party even bother to assemble this cute defense force team? Ssst.. It's because the chief of defense party, Onigawara Rikushiro's, has his granddaughter placed on the defense force team.
Onigawara Mao (ground defense), Chikusima Misora (sky defense) and Maruyama Silvia (marine defense), three of them make the defense force team and they all look alot like cute miniaturize Love Hina'a characters (I told you before). When three of them combined together, they can unleashed great power. Add Mishima Kagome as the commander of the team, can they really fight against mysterious alien?