Vegeta finds his own path in training rather than always chasing goku's footsteps. He even surpasses him and defeats him on two occasions.
Goku ends up with Bulma and Vegeta with Bulma's older sister Tights. Despite this, their children have the same name as original works, enforcing the river of time principle. Poor trunks coming back from the original future only to find his dad married to another woman and his mom doesn't even know it.
The first girl, who is conveniently tied up in a random mansion he walks into first eats his food then holds him hostage for more. She then becomes a bodyguard in this cruel world where naivety will be taken advantage of by EVERYONE and only a couple of chapters later she is completely in love with him and they're having s*x. The relationship developed even faster than their intimate scene together. I mean, damn, the dude only lasted a single sentence.
the second girl is a young genius programmer who is sold to him as a slave who is quickly forced to call the MC and girl#1 big brother and big sister. A couple chapters later and this girl has fallen in love our MC and the whole slavery status appears insignificant/forgotten.
The third girl is a former boss who fired him and has a cold personality that despite having been in a long term relationship with someone else, has never let a man touch her body or even kiss her. Despite this, the MC simply says her house smell nice and she begins to fall in love him.
The rich noble in the hunter examination is a typical golden spoon child used to getting everything he wants and takes a typical xianxia approach to the main character demanding he works for him or he'll basically turn him into a cripple. One gunshot and a threat later at Minor Goon A and this noble has suddenly become apologetic and will give up all his items in the hope that the MC will forgive him.
The head examiner Yi Yeyu is initially portrayed to be the cold beauty with a strong S side to her, nicknamed "that witch" by someone. However later when the examination is suspended and the kids are in danger, she is in tears for them to leave what will become a battlefield. Is she supposed to be tsundere? A sadist? Who knows, I can't even tell anymore.
The MC tells the examiner about there should be a trancendant monster controlling the others and she takes his word for it, halting the examination and making a report to the higher ups. This is a fully grown woman, an experienced gold rank hunter in the top 1% of all gold rank hunters, deferring to what she can only see is a fifteen year old boy with no 'cultivation' without questioning, verifying, or in fact even probing any further in any sort of way.
After he comes to this new world, he suddenly becomes a cultivator without prior knowledge or anything, yet has a strong grasp over it. This is kind of like a middle aged dad going into war for 2 days before becoming a weapons expert on the level of special forces.
The second issue is ammunition, he seems to have an unlimited supply of it. Despite being a pilot test flying a new plane and crashing into another world, he somehow has an enormous amount of bullets. I was getting the impression his gun was hacked to have unlimited ammo until it was mentioned he was all but out just as he finds a gunpowder substitute.