In this world, there are two types of heroes. Registered legal heroes who have the backing of the public and media, and unregistered ability users who operate in the shadows beyond the law. They save people but sometimes face criticism for their methods. I'm one of those unregistered ability users. People call me a 'dark hero.' By day, I'm just an ordinary college student. By night, I'm a nameless vigilante hunting down villains in the shadows. And then there's the light that always finds me—my partner, Kilon. The golden boy hero everyone adores. With his smooth-talking charm, he gets under my skin worse than anyone, yet he's the only partner who always has my back when it counts. People call him a 'light hero.' While we constantly bicker and throw barbs at each other, we fight side by side every night, chasing down fleeing criminals and keeping the city's delicate balance intact. Monsters and villains that threaten the nation, and a creeping darkness that slowly closes in, targeting both of us. The secret and electrifying partnership between light and shadow—these two heroes' story begins.