9th Elementary Anti-Alien Squad
E1
Yuri has to fight aliens invading her school, and must wear some kind of yucky alien helmet...
Boredom, Spaceship and Overgrowth
E2
When Yuri arrives at school, she finds a weird huge mushroom-like thing in the playground.
Summer Vacation, Borg and Death
E3
Summer vacations have come at last, but Yuri is depressed. She still hates fighting aliens…
The End of the Beginning
E4
One day, a gigantic alien appears on the school rooftop and won't move from there anymore…