Synopsis
In Big Money City, people engage in "Hero Battles" by using Bankfon Gs, which lets them rent mighty hero suits and compete against others, gaining power boosts through the system's public domain ability. Kaito Goushou, a young elementary school student who's always keen on lending a hand, hastily signs a contract to rent the rare unlisted hero suit "Enter the Gold" from a shady priest named Sennen. He soon discovers the suit comes with a debt of 10 billion yen, and Kaito must now pay it off by winning Hero Battles.