The supporting character's harem is very normal - Chapter 83 Cooperation

Suo Fei, a veteran NEET has spent three-days and three nights strategizing his way through the highly explicit H danmei game masterpiece “Yalance”. Furthermore, he was able to capture all nine little shous from the nine great races. However, as the final, 10P feast was approaching, he unexpectedly transmigrated. He transmigrated into the real country of Yalance…

Suo Fei: Hey, hey, hey, can you delete these files and let me restart? What the hell did Laozi transmigrate into!

- Description from Novelupdates

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).

Wealthy, powerful and handsome; Gu Jingze is the cream of the crop in the entire country. Every guy wants to be him and every girl wants to be with him. His life is perfect… except that he has one tiny secret that keeps him from getting close to any woman—apparent impotency.

As the final dragon lay defeated, Aaran stared at the sky while the rest celebrated.[Awaiting the gods’ response...]He clenched his fists, his heart pounding. A shred of hope flickered in his eyes, only to be extinguished like always.[The attained outcome was deemed unsatisfactory.]Aaran had seen the message for the twentieth time. He had become the gods’ plaything in their desire to witness the “perfect ending”.He regressed once again, but this time as a toddler and charm being the only stat he had.But something was amiss. The world he remembered had changed. Powers that did not exist before had taken hold of the world.Tired of following the traditional route, Aaran chose to fight darkness with darkness… as the gods’ chosen necromancer!