It takes place in a town known as Solid City, which despite being technologically advanced, is overrun with crime. Criminals are fought in random encounters in various sections of the city. Healing items are used to fix the attack robot and can be bought at a special warehouse. The player must go to the correct district for crime fighting action and the game refuses to send the player to the district that he isn't authorized to be in. The combat is handled from a third-person perspective in which the player must select commands (using buttons and not a menu screen) for his turn in an attempt to defeat the enemy's mech.
All dialogue in the game is in Japanese; literacy in the language is required. The game takes place in a top-down perspective for the overworld. From there, the player can talk to NPCs and explore.
Shuu: A detective in Metal City. Engaged to the daughter of the Shadow Dragon organization's leader, Eileen. Despite his job, he still has to pinch pennies to keep his combat mech in working condition.
Ion: A girl who ends up as Shuu's partner. She eventually becomes something of a love interest.
Eileen: Daughter of the Shadow Dragon Organization's leader. Engaged to Shuu.