Chaos' Heir - Chapter 13 - Doctor

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates

Xu Xiuwen, who was battered and bruised, was reborn and found himself back at the farewell dinner after the college entrance examination. It was the year 2005. Facing the aggressive former love rival and the childhood sweetheart he once had a crush on, he decided to start a new life. After being reborn, he not only wants to recover the white moonlight that he missed in his previous life, but also builds his own business empire. Fame and fortune, career and love, he wants them all!

Hulk was a pro football player, a guy who loved nothing more than clutching a pigskin and barreling through the defense like a runaway freight train. He lived for the gridiron. But he never, in his wildest dreams, imagined he’d see a pair of nipples bigger than a football. He became a giant baby, reborn with a new name: Orion. Orion was the runt of the giant litter, the weakest of the bunch. But when he turned ten, something crazy happened. He saw a strange panel – that not only displayed his stats but also helped him level up. With the panel’s help, and a whole lot of elbow grease, Orion led his giant tribe to become the most powerful in the Barren Mountains. He went from zero to hero, becoming a mighty Titan King. He was no longer the runt; he was the top dog.