You run as fast as you can but stop when something comes crashing through the ceiling. Among the mess of debris, you and your girlfriend spot a moving body. You quickly recognize it as Might Mistress, Justice-Man's fellow Kantonian, after seeing her distinctive red costume with a small hole cut in front to expose her massive D-cup breasts.
Might Mistress coughs up some blood. "Damnit. I didn't expect Lector to have a Kantonite barrier around this place. I've been exposed too badly. I'm-I'm going to die..."
Your girlfriend takes her hand. "You can't die!!! Someone has to stop that lunatic!! Isn't there an antidote or something to Kantonite poisoning?"
Might Mistress shakes her head. "No. But there's another option. Though I can no longer fight, I can still give someone else my powers to fight instead. I can tell both of you have pure hearts. Put my blood into your bodies. You've the only hope these people have..."
She stopped talking and her eyes began to roll into the back of her head. You locked eyes with your girlfriend. You both knew there was no other choice. Using the pieces from an emergency aid kit hanging on the wall, you carefully transfused Might Mistress' blood into your arms. As the blood drained out, her body shriveled and shrank until all that was left was a skeleton wearing her red suit. The blood had an instant effect: both you and your girlfriend grew in height, with thick layers of muscle building on your arms and legs and massive six-packs erupting on your chests. Suddenly, you could fire beams of intense heat out of your eyes, breathe and cover the room with ice, and move at speeds faster than the human eye could track.
Unfortunately, the transformation process also resulted in both of your clothes being shredded beyond repair. Admiring your statuesque muscular body, you caught sight of your girlfriend as she cut her hair to match the fallen heroine. Watching her beautiful big boobs bounce as her perfectly toned arms and legs moved over her curvy torso and fat round ass made you uncontrollably horny. What you hadn't realized was that by infusing Might Mistress' DNA into your own, you were now compelled by instinct to prioritize the survival of your race above all other concerns. There were many more humans who needed to be converted into Kantonians, but right now, it was imperative that you mate with this genetically pure Kantonian female and produce offspring.