Agent Rain, alongside her partner Sunny, infiltrates a hideout harboring a subordinate faction of the evil mega-organization Eterno. Rain is calm and composed, while Sunny is reckless and wild—yet the two constantly support each other, dismantling the cell and arresting its mastermind. However, headquarters issues an order to cease all investigations into Eterno. Strongly driven by justice, Rain refuses to accept this and resolves to take down Eterno by any means necessary. To accomplish this, she secretly acquires the Cyber Agent Suit, the latest wearable weapon developed by the central agency. With determination, she decides to enter Eterno's battle tournament. The fate that awaits her… [BAD END]