Sezon 1

Yuri has to fight aliens invading her school, and must wear some kind of yucky alien helmet...

When Yuri arrives at school, she finds a weird huge mushroom-like thing in the playground.

Summer vacations have come at last, but Yuri is depressed. She still hates fighting aliens…

One day, a gigantic alien appears on the school rooftop and won't move from there anymore…