A mysterious assassin suddenly ends up in the world of Girls Frontline, his favorite game.

Chuck Bullard was a simple soldier stuck guarding a tiny supply depot. He spent most of his time playing Girls Frontline and doing nothing. One day he ends up in his favorite game and is given the chance to be the hero he had always wanted to be.

Chuck Bullard is a deadly mercenary, known as the Cloaked Man, and is used to working alone. What will happen when he accepts a job working for an old friend, Berezovich Kryuger, as a commander? Will his lone wolf ways lead to failure or will he finally learn to accept help?