Action Taimanin sets its action in a Tokyo where the pact barring demons from interfering with humanity has collapsed. As crime and chaos spread, the Japanese government forms a force of taimanins, ninjas equipped to oppose the demonic invasion. The story follows a newly established task force on its first mission: retrieving a stolen bio-weapon, a job complicated by an unexpected ally and an adversary with a connection to Igawa Asagi.
Combat is built around hack-and-slash action controlled with taps and swipes. Players can combine skills, supporters, and weapons to shape a combat style, while the character roster draws on the Taimanin franchise. Supporters also connect combat progression to story: winning their favor unlocks exclusive visual-novel stories. Away from battles, a private room offers a different kind of customization, letting players pose and deploy 3D character and enemy models to create action screenshots.
The store listing identifies Action Taimanin as both single-player and multiplayer, with online PvP among its categories, so its play format spans a solo story premise and online competition. Its mix of mobile-style touch controls, customizable action, character-focused stories, and a 3D sandbox gives the game a broader identity than its demon-fighting plot alone suggests.
