Grade school students fight against supernatural forces.
Moving to a new town is tough, and with no friends, it can be scary; in Satsuki's case, that last part isn't helped any when she, her little brother, and three kids from school end up in the old schoolhouse, which happens to be haunted by ghosts.
People all over town begin acting strangely; most of them have been replaced by mirror-world clones of themselves. With Satsuki and Hajime being the last two people in the town who haven't been swapped, they'll have to find a way to end this ghost.
Leo is convinced that there's a ghostly website out there on the internet and is determined to find it, which he does; trapped in the computer, the rest of the gang needs to figure out how to apply old-fashioned exorcism to new technologies.
There's a girl in Satsuki's class who is a little off; she tends to the rabbits at the school, whom she says are her only friends. But if that's weird, then it gets only stranger when a dead rabbit shows back up at the pen, alive and well.