From Easy Going Scans:

Mia has a special talent which she didn’t know she had until recently. If she concentrates, she can transfer in another dimension called “Layers”. That dimension has no people except those that can transfer of course and... The monsters that lurk there! If you accidentally get trapped in “Layers” your only hope is... The Special Class!

From: Easy Going Scans

They have a plan to replace the whole town with a fake ones from Layers. Will the special class be able to stop them?

Made into a free to play RPG, Lime Odyssey: The Chronicles of ORTA follows the journey of an ordinary high school student who is thrown into the fantasy world of Orta.