The supporting character's harem is very normal - Chapter 303 Sakuth’s worries

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

After the heartbreaking execution of his parents due to their lower status and their rebellion against the King of Varanasi. Sukoh Yadav a fourteen year old boy sets of to China along a merchant group to become a great General in China and to conquer his homecountry and abolish the very idea of caste.

Ye Han was reborn into a parallel world and participated in the challenge program [365 Days of Wilderness Survival] jointly organized by the world. At the beginning, he got a BUFF bonus with a lucky value of 9999. With his little cook, Ye Han started a shocking journey of survival in the wilderness.

When the other players were hungry, Ye Han had already eaten seafood. When the other players had no fixed place to live, Ye Han had already built a wooden house. When the other players were precarious, Ye Han was drinking tea in his manor. Ye Han: No way, my luck is 100 million points.

- Description from novelbuddy

The Republic of San Magnolia.