Saving the Blackened Villainess

Qin Zichen—Known as a the indomitable bloody tyrant of an Emperor, was stripped of everything overnight after a horrifying chaos broke throughout the Leng State that he ruled from people that wants his head hanging on the gates of the city.
After experienced a betrayal from his trusted general, Qin Zichen vowed to return and use the blood of his enemies as a sacrifice to his dead people. And so, he agreed to the unseen figure that called out to him, offering him a helping hand to crawl out of a devil's lair.

As he agreed, he woke up in a completely unfamiliar world with insane and advance technology, possessing the body of a wealthy business man whose close friends with the male protagonist of the novel.

After given a task by the voice that called out to him to tame the crazy lady who does everything in her might to destroy the blooming love of the male and female protagonists.

But why is that when Qin Zichen met the vicious female partner. She wasn't that cold like the system had told him

Instead, she was very clingy?