Grab your guns and fight monsters in the VR world.
It's a simple game where you move through the game in a one-way manner.
-Background setting-
The protagonist is an agent of Sentinel, an organization that stops demons from all over the virtual modern world.
One day, Sentinel is subject to a massive invasion of his enemies and heads to his destination according to the urgent order.
The content of the game is a middle story, and the player runs a train chase after passing the subway.