The supporting character's harem is very normal - Chapter 527: The Battle

Others treated disease to save person, he treated disease to steal heart.

The Frost Goddess was deeply captivated by him. The gentle and kind beautiful teacher was completely enchanted by him. Even the cold and beautiful female assassin melted quietly because of him.

Competing in medical skills? He was the one who treated the Godly Doctor. Competing with backgrounds? Leaders rushed to him. What? You actually wanted to compete with him in a match for match? Looking at the gentle girl beside him, Tang Yu had a headache as he said, “Beautiful girl, how did you fall in love with me?”

- Description from Novelupdates

After transmigrating to a world similar to Earth, Jiang Qiao was approached by a former goddess—Ocean Blue. As Bluestar is also on the verge of collapse from invaders of other worlds, Jiang Qiao must find a way to save this one. With the ability to create a virtual game world, he creates the world of Sacred Souls. In order for this new world to grow, it has to devour other worlds. Thus, the greediest, most cunning, and horrible beings came into existence—Players.

Traveling to the Marvel world, Luo Bai found that his luck had improved.With no place to live, Tony offered him a villa.Although he had no abilities, the Ancient One stated that he was more gifted than Doctor Strange and could become the Sorcerer Supreme.Without any magical weapons, he simply picked up an infinite stone while walking.When Thanos came to steal the stones, he didn’t manage to grab any; instead, all the other gems were “gifted” to Luo Bai.They say that magic must be borrowed and repaid? In the end, he became invincible...Disclaimer: This is Translation

“Why does no one remember the true world?!”