Lee Min-joon, an ordinary office worker, becomes the first reviewer of a friend's mobile gacha game. He closes his eyes to the boring opening and reopens them in the game world. You have to take charge of the mechanics of directing and controlling the heroes. Suddenly, the first hero is summoned at the beginning of the tutorial, and Min-joon is delighted with the handsome hero who looks quite strong, but it turns out that he is a low-level character with no memories or proper weapons.