In a world where dungeon crawling has been revolutionized, the adventurer industry prizes the ninja job above all others for its three essential skills: high-speed movement, stealth, and lockpicking. Four ninja—loud, boisterous, and utterly lacking in subtlety—are expelled from their party for being far too noisy. With their unique talents and even louder personalities, they find themselves unemployed and adrift.

Meanwhile, a viscount’s daughter is burdened by a crushing debt that must be repaid by the end of next month. Desperate, she posts an urgent recruitment notice promising quick, high earnings. The four explosive ninja answer the call. What follows is a frantic, two-month rollercoaster as the unlikely team races against time, using a combination of wit, improvisation, sheer momentum, and the ninja’s blinding speed to tackle every obstacle—from rampaging monsters to financial collapse. As the deadline looms, a mysterious rain, a vanished A-rank dungeon, and a colossal “night wind” threat push them toward a final, high-stakes confrontation. With ingenuity, grit, and a whole lot of noise, the viscount’s daughter must somehow hold the chaotic group together and carve out a path to survival.