The supporting character's harem is very normal - Chapter 288 Kill him!

A world only I know of, now I will take it all for myself.There’s no kind soul here willing to share and eat nicely with others.Only the ruthless one who will devour it all alone exists here.

Wang Jin found a beautiful drunk mixed-race boy on the side of the road. He looked pretty at night and couldn’t help bringing him home and sleeping with him. When he woke up the next day, he found out that the beauty was a minor.

This is the story of two people who met by chance, their lives turning from narcissism and selfishness to falling in love with each other’s trivialities.

- Description from Novelupdates

Having crossed over into a world of Chaos and Order, brimming with all manner of bizarre items, Qiu Tu discovered he had actually slept with a VIP’s mistress... Since he had already been discovered, might as well... go with the flow? Strengthening his power, cultivating his influence, unearthing beautiful... and powerful subordinates, he steadily climbed to the peak of this world! Cataclysmic abilities and strange items included: the Cihuang Stone that could erase one’s impression from others’ hearts; a mythical beast’s head that could summon storms with a kiss; a piggy bank that could store emotions; a reversal potion that increased Favorability when hitting someone, and so on...

Leo is an academic genius who enrolled in one of the top universities in the world for the rich and powerful, but he was born in a common family, which was more than enough of a reason for the other students to mess with him.