Wokao Hougong Zhengfu Shijie

The young Li Haoran was ruthlessly backstabbed by his teammates in a battle with alien beasts and died tragically. When he opened his eyes again, he found that he was reborn as the Blood Demon King in a tribe full of succubi, and he also obtained a special system that can make his abilities stronger as long as he has a harem. This time he must seize the opportunity, become a demon through repeated tempering, and lead his harem to conquer the world!

(Source: Tencent, translated)