The supporting character's harem is very normal - Chapter 282 What I need... is you.

Are you afraid of death?For Jie Fu Lian, who had already come to terms with his death, the thought of being alive was scarier.Although his death was quite tragic, he still lived a fulfilling life. He had done everything that he had wanted to do and he had achieved everything that he had strived for.Even as he died, he only had a single regret.He regretted the fact that he couldn't thank Hua Tianshu, an enemy who had stood up for him till the end.His death was quite painful but he wasn't unhappy with it.However, it should have ended right there.Why the hell was he now possessing the body of a tyrannical demon king?!The heavens above were certainly playing with him and laughing at his misfortune!As if possessing the body of his enemy wasn't enough, out of all the people that he could run into, why did he have to run into Hua Tianshu?!Just when Jie Fu Lian thought his luck couldn't get any worse, Hua Tianshu just had to go and recognize him as well!“Is this what an ill-fated relationship means?” Jie Fu Lian's lips twitched.It was as if even death couldn't break the red strings that had tied the two of them together.“Why are you so nice to me?”“You wouldn’t believe me even if I told you the reason,” Hua Tianshu sighed.“You are falsely accusing me. I trust everything you tell me.”“I like you.”“I like you too, brother,” Jie Fu Lian beamed, however, this response only disappointed Hua Tianshu whose words had been misunderstood once again.“We are clearly not on the same page,” Hua Tianshu sighed as he turned around and left.Jie Fu Lian frowned as he tilted his head cluelessly.The new demon king is a thick-headed idiot who can’t even take a hint!

By the fourth year of Su Wan's career, every league rookie hears the same warning from their coach and veteran teammates: “You can try to impress him. You can even try to defend him. But no matter what—no matter if he hurls the most brutal insults your way—never, ever talk shit to him!”

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

I cut from south to north,

I cut from white to black,

I will cut down the thousand mountains and the ten thousand waters,

I want the world to know who I am!

I am Gu Zhan,

Gu Zhan who wants the whole world to surrender!

- Description from novelbuddy