After becoming an official government adventurer, Mizuki catches the eye of adventurer Himata, who attempts to force Mizuki to join a planned coup. With Kessie's quick wit, Mizuki somehow escapes danger, but it's out of the frying pan and into the fire when a boss chimera starts raging. Will this become Mizuki's final battle?! The story of a salaryman's rise from background character to a starring role reaches its grand finale!