Escort squad 'D-75' was attacked by some unknown enemies,who stole an important cargo of the kingdom.The queen is considering to dispatch KSS force to retrieve it. These female gun knights they use guns hence the name gun knights. Female gun knight 1, female gun knight 2, female gun knight 3, female gun knight 4, female gun knight 5, and female gun knight 6 serve their queen. Right now female terrorist name black delmo is spying on these 6 female gun knight. Delmos are their enemies.