"If you don't return within three days, consider yourself dead as you fell into a trap. At that point, the attack plan will be cancelled. Got it?" With those words, Shibata, his superior officer, entered enemy territory alone three days later. Codenames Maia (Asahi) and Eris (Ayumi) disobey orders and invade enemy territory to rescue Shibata. However, the enemy forces have the upper hand. With Shibata held hostage, the two are captured without being able to do anything...