A boy framed for a crime steps into the fighting ring to get revenge. After defeating his former enemies one by one, his exceptional talent gets him kidnapped and modified by a monster organization. But they botch the gender of the monster they fuse with him, changing his gender when he transforms as well.
The magical girls who once slandered him, the monster organization that tried to turn him into a monster, the alien beasts that devour fear and despair, the aliens eyeing Earth hungrily, and the monsters that have returned: he will tear them all apart.
Red Girl: "So this world never suffers again, and so I can protect you, the person who matters most to me, I'll find the courage to fight for love!"
Purple Girl: "How can you see a rainbow without weathering the storm? For the sake of a brighter tomorrow, let's fight side by side!"
Green Girl: "Even though this body is mechanical, I'll do my best to give you 7 to the third power children!"
Blue Girl: "My super-intelligence tells me it's time to summon super strength. You're up, Saiyan Wu Xin!"
Wu Xin, now a girl with black eyes and red pupils, hides the golden soul stone against her chest. "Red saintly mother, purple battle maniac, green repressed, blue idiot, me, black, ferocious, golden, hope?"
"Henshin!"
Gradual transformation, fighting, no romance with men (there are no male characters among the main cast)
It features techniques from wrestling, boxing, and Brazilian jiu-jitsu. I hope everyone who's interested will join the discussion.