Dragon Ball: Under One Punch, All Are Insects

This is terribly written. Don't read it. I never intended to write it properly in the first place. [Dragon Ball World] + [Fake One-Punch System]

Please read the description first. I want to write a character who fits into the Dragon Ball world, so the writing will be a bit over the top. As for Saitama's strength, just go along with it and treat it as wish fulfillment. I admit I made the protagonist a bit too useless. After the fight with Perfect Cell, I have to change that. Even if he doesn't suddenly become overwhelmingly powerful, he should at least be able to fight with ease before finishing things with one punch.

The protagonist dies while saving someone and transmigrates into Dragon Ball, where he gets a System that can break the body's limiter. It's a crude System, but it can gradually unlock abilities until he gains all of One-Punch Man's powers. The crude System does have its flaws: a twenty-percent margin of error costs him some of his emotions.

Use your imagination. Writing the description really takes a lot of brainpower, so feel free to help me come up with ideas. That's more or less the gist of it. This is my first book, so the beginning might not be very good. Bear with it. If you can't, then drop it.