Imagine trying to become stronger than a peak human in earth, a world without superpowers. With a weak body, but no limit to your growth, do you have what it takes to bear that power in you, do you have a firm belief of true justice?
If you do, do you have what it takes to surpass a bullet? With the ability to adapt to any physical contact and gain corresponding abilities, can you endure it?! Can you!!
With enough training you can even achieve what a certain bald hero for fun reached with physical training. Well certainly you have the potential, but with the weakness of being unable to move oneself to surpass his limits... Until you are shown that your family died from a certain accident, chased by gangsters in motorcycles your family took a turn in speeding, and the truth broke you apart.
It was not the gangsters who ended them, they were trying to tell them, but because of their huge evil like villainous body with face like gangster for they are gangsters scared them, and these gangsters. Worried they may not hear their warning, they followed after, alas it was too late as the road has several cracks and holes, your family crashed to a nearby wall and the building next to it, as if it wore an evilish grin, collapsed burying them.
And to take the body out for cremation, you have to pay a huge sum of money, and the kind gangsters who apologized donated money.
Turns out you found that these gangsters are just delinquents with family issues, that's why they ganged up together and try acting tough to lessen their anxiety.
Now you know how cruel corruption is, especially in people who lived in that area and their origin as immigrants who spread in the world occupying their self-proclaimed land and teach people to hide their true nature.
You know you can't stop them and the people behind their backs, so you decide to train and train. While doing that you also begin to discover your superpower, like heating your arms and whole body, turning what you touch into cold ice, it's like what was exposed to your body is slowly taking effect and it's really exaggerated.
Like your body is not ready to claim these powers, in training it allows you to touch these dormant powers, but it's not actually that.
To gain these corresponding powers, you have to endure the pain and survive from freezing to obtain a minor ability to produce ice from touch, the ability to produce water and drink it to stay hydrated from almost choking on water, the ability to zap from surviving electricity from fingering the fork to the extension wire.
So the result of your effort is minimal, but enough to slightly evade a bullet of an old school weapon of the WW1.
Your ability can kill people instantly, but can you survive a missile? Lava? Nuke? Disease? Mutations?