In the bustling metropolis of Big Money City, gamers engage in epic showdowns known as 'Hero Battles' utilizing Bankfon Gs, enabling them to lease formidable hero suits to engage in combat against fellow players. Through the system's unique public domain feature, combatants can access additional power boosts. Enter Kaito Goushou, a compassionate elementary schooler always ready to lend a hand, who impulsively commits to a contract to rent the renowned yet undisclosed hero suit, 'Enter the Gold,' from the enigmatic and dubious priest Sennen. To his shock, Kaito soon discovers the exorbitant price tag attached to the suit - a staggering debt of 10 billion yen. Now, in a race against time, Kaito must triumph in Hero Battles to settle his monumental dues.