Star Dome Railway, why are they also simulating!

After loading the life simulation game, Ron, who was just an ordinary Silver Mane Guard working from nine to five in real life, began to work day and night...
In the simulation, he is Bronya's most loyal guard. In order to stop Cocolia from destroying Beloberg with the star core, he sacrificed himself and turned into a meteor in the sky along with the star core.
He is Natasha's most reliable assistant. Together with her, he researched "Snowstorm Immunity" to save Beloberg. When the evil creatures of abundance were rampant, he prayed for the blessing of the pharmacist.
He is also the most intelligent collaborator of the Black Tower. In the face of a crisis that could destroy the starry sea, he gathered the hopes of the entire starry sea into an ambition to save the world and wore the crown of the Star God.
He thought it was all just a game, and he was the only player in the game, until...
He was dumbfounded as he watched them swipe out magical cards like [Ron, the Protocol of Rectification], [Ron, the Inscription of Savior], and [Ron, the Embers of Death] in the game:
"So you are not NPCs?"
"——Wait! Who is the player?!"