Kousei Academy: where the protagonist has recently transferred.
Whispered rumors surround this place.

"Another world" where strange creatures dwell appears within the school...
...and once you've wandered in, there's no way back out.

After seeing this other world "a Glitch" with his own eyes,
the protagonist realizes several people have been replaced with monsters.

You must fight alongside your friends
to save the academy from imminent destruction.

As a "Leader"
that guides others forward,
or
as a "Ruler"
who believes might makes right.