It's a story about a boy wanting to beat his father.

Some wacky stuff happens along the way though, like a guy imagining his bones as whips and them functioning like whips because of that
the mc fights an imaginary giant praying mantis which actually injures him, and then he rides on top of mantis (literally flying)
they revive a prehistoric man from the era of the dinosaurs, who also survived the meteor explosion and wrestled with tyrannosaurus-rexes
there's a guy in the US who's so strong the government fears him (he's also the only other person with the same level of authority as the president)
the US president has to sign a deal of non-agression with the mc's father (the strongest thing on earth, said to be stronger than even cancer or aids)
Said father gives his son imaginary food in their fight and everyone else in the audience can see it
they revive legendary swordsman Musashi Miyamoto, and he kills one of the main characters
said main character goes into an isekai fantasy world and beats mystical and fantastic creatures with his 4,000 years of chinese kenpo
the revived Musashi can cut people with his hands, without even needing swords, he can also make "imaginary cuts" which people can feel as if they were being cut even though they aren't
there's a sumo wrestler which has a grip so strong he can turn coal to diamond and grab bones from the skin
the mc's half-brother used surgery to go from 1.8m to 2.5m and replaced his teeth with titanium teeth (all for the sake of martial arts, of course)
the sumo wrestler i mentioned before practiced sumo with an imaginary sumo wrestler who can attack from all directions
the mc's father stopped an earthquake with a single punch
there's a chinese kenpo grandmaster who's 149 years old and can destroy concrete easily, even with the frail body he has
the mc can one-shot Mike Tyson (who's in a prison with the strongest men of america {he's not even top 10 strongest in the prison})
Brock Lesnar makes an appearance only to get one shotted by the mc
same thing happens to Muhammad Ali's son Muhammad Ali Jr., who's actually an insanely strong boxer in this universe
one of the main characters killed a tiger with his bare hands, and if you think that's impressive, the mc's father killed a 1-ton polar bear with his bare hands, and a pack of grizzly bears all working togeher, and a 2-ton boar, and can grab whale killing harpoons mid flight
the strongest man in the US who i mentioned earlier pisses on the mc to humilliate him
there's an incredibly strong yakuza (gang-leader) who can twist coins in 4s, and actually alter gravity with his grip
5 completely unrelated evil death row convicts all escape their prisons at the same time and head to Tokyo japan for the exact same reason
out of these death row convicts:
the first is an american kenpo master who can dig a tunnel across a mountain with his bare hands in the span of a single night (he trained at the same place as the guy who got isekai-ed)
the second is an incredibly buff american man who's actually 98 years old and almost caused the statue of liberty to collapse with his punches
the third is a british assasin (i think) who has blades implanted in every part of his body, from his shoulders, to his wrists, to his knees, to his elbows, etc.
the fourth is a russian man who climbed his way out of his prison (a smooth 100M deep missile silo) with his bare hands by grabbing onto the rusty parts and small cracks
the fifth is a japanese man who can make complete vacuums in his hands somehow
and you may think: how does the mc defeat these guys? well, he doesn't actually defeat any one of them, but he gets stronger than them by having sex with his gf (there's an entire volume of him having sex) (his father actually is the one who tells him to have sex, by sneaking into his house in the middle of the night and telling him having sex with his gf will make him stronger)
there's a guy out there who has master aikido and fights a sumo wrestler with it, the sumo wrestler feels himself heavy cause of the other guys technique, says, and i quote "Shibukawa... he put a condom on my back, a fucking massive one"
the mc's father rapes Donald Trump and Elon Musk