Two high school girls, Mahiro and Chisato, lead seemingly ordinary lives on the surface, but they harbor a dark secret: they are highly skilled assassins. Trained from a young age, they have carried out numerous missions with precision and stealth. As they reach the end of their school days, they face a new challenge beyond their secretive jobs—integrating into normal society and sustaining a cover without exposing their true identities. Their agency mandates that they take on mundane day jobs as part of their training to blend in, which proves to be more difficult than any mission they've undertaken.

While juggling their double lives, Mahiro and Chisato find themselves grappling with the mundane challenges of daily life and unexpected threats from rival gangs. Their cover jobs place them in hilarious and awkward situations that contrast sharply with their lethal skills. Despite their professional lives being marked by danger and secrecy, the two young women develop a bond as they navigate the pitfalls of transitioning into adulthood. As tensions rise, Mahiro and Chisato must rely on each other more than ever as enemies close in, testing the limits of their friendship and skills. With heart-pounding action sequences and moments of genuine camaraderie, their journey explores the complexities of living two lives while striving for a semblance of normalcy in a world that seems determined to keep them apart.