A sixteen-year-old named Mamoru Tsukishiro embodies Greed, one of the seven deadly sins. Gifted with an auditor’s eye for discrepancies, numbers and business instincts he cannot explain, he is constantly bullied at school and becomes the target of two rival cults embedded in his class: one sworn to protect him, and the Blessed Ledger, led by transfer student Shizuka Kurobane, whose family prospered by embracing Greed and raised her within its ceremonial faith. Shizuka hides her true allegiance in plain sight until she hears a prophecy connected to Mamoru Tsukishiro.