Survival Tactics of a Complete Extra

A man from Earth had awoken inside a game that he'd been playing as a past time. But he then later finds out that he's reincarnated into the body of Arden Black, a complete nobody that he knows nothing about. Not wanting to die once more, he vows that he will try to survive the tragedies that will happen whilst supporting the main characters from the sidelines. But will that statement be true to his word?