校园外星人

描述距离现今不远的近未来世界，世界到处都可以看到异形，人们一点也不觉得稀奇，在小学里面只要升到了六年级就有可能成为“异形应变小组”的成员。

而这届被选为“异形应变小组”的是大谷由莉、川村久美以及远峰霞这三个女生。而“异形应变小组”成员，各自以共生型异形－宝咕为搭档，将入侵学校的各种异形加以击退与捕捉。本来以为就只是这样而已...

其背后其实隐藏了非常巨大的阴谋。

Yuri Ootani, a girl who has been afraid of aliens, has been chosen to be on the alien party with the class president Kumi Kawamura, whose only intention to join the alien party is to get out of presidential duties, as well as Kasumi Tomine who is perfect at everything she does, including fighting all the aliens that come in their way. But can they defeat a massive alien who has already abducted Kasumi?