Sakura, the sole female member of the Earth Defense Force and a key combatant, transforms into the Gigantic Heroine Apollonia, battling colossal monsters daily to protect Earth's peace. A new threat soon emerges: the Kerozarg aliens, whose terrifying plan is to destroy Apollonia and conquer Earth. To achieve this, they kidnap Shosuke, a fellow defense officer close to Sakura, brainwash him, and use him to emotionally manipulate her. Though the Kerozarg aliens appear friendly and approachable on the surface, their true objective is far more sinister—to sexually enslave and train Sakura as a sex slave, weakening Apollonia's combat abilities through psychological and physical domination. As Apollonia's fighting power plummets, the Kerozarg aliens ally with a vicious space criminal and launch a massive assault, devastating the city. Barely able to stand, Sakura transforms into Apollonia one final time—exactly as the Kerozarg aliens intended. Their ultimate goal: to publicly humiliate and break the hypersensitive Apollonia in front of the terrified masses, spreading despair and chaos. Can Sakura stop the Kerozarg aliens' horrifying scheme? The answer is here—now! [BAD END]