Ultimate: Starting with Yujiro Hanma, spoiling the sun until it cries.

Travel through the world of KO One 3.
He's a supercharged version of Yujiro Hanma, standing 2.3 meters tall, weighing 450 pounds, and with explosive muscles...
Furthermore, through continuous training, one can rapidly increase their combat power index, becoming the legendary KO.1 right from the start!
Thus, the strongest high school student on Earth was born!
"Wang Da Dong, the strongest high school student in history? Try taking one of my punches!"
"Lei Ting, you're talking to me about rules? Sorry, rules are for the weak!"
"Black Dragon wants to go toe-to-toe with me? Can you withstand my fists that are the size of sandbags?"
When Cao Buyi learned that his fiancée was the sun, he immediately understood.
Lei Ting: Waaah, he's not KO.1, he's a ruthless thug! I'm quitting being the leader of KO One...
Black Dragon: Excuse me, that wall, move aside, I've wandered onto the wrong set...
Flamebringer: Hey, can I not fight him? He's too strong...
Sun: Waaah... I can't take it anymore... This isn't a human, it's a human pile driver!