Having barely survived on Earth, the protagonist is saved by Lisa, a kind and beautiful human girl, and spends his days protecting Earth's peace. But now, the cruel alien Mr. Mrs. Cruel has discovered him and takes Lisa hostage, targeting Mighty Mars. Lisa, who once saved his life, is now captured and held captive. Before her eyes, one unspeakable downfall after another unfolds. Lisa herself is driven into the most humiliating situations a woman can endure. If Mighty Mars vanishes from Earth, the planet will be destroyed. That's why he continues to fight desperately. The fate of Earth now rests entirely in your hands!