Apocalypse: After Being Reborn, I Stocked Up on All Supplies - Chapter 28 - "Beautiful and Kind-hearted"?

In his past lifetime, he was an exceptional prodigy who practiced both medicine and martial arts. In this lifetime, on earth, he used his superb medical expertise and extreme martial arts achievements from his past lifetime to excel in the medical field and the ancient martial arts world. He moved his way towards the pinnacle!

A dark soul, damaged by his past An angel forced to be his mistress. Can anything go right? Would they ever be able to fall in love? Will she be able to see past his darkness? Will he be able to protect her when danger comes knocking? Find out in this book... An Excerpt*

''You know what you are getting into, right?'' He asked, crossing his legs, he raised a brow;

Tiana's lips slanted and her eyes narrowed at him;

''As long as you pay me, I'll do whatever you want. '' Nicklaus was amazed by her sudden audaciousness;

but he was sure she was just trying to seem bold, He knew her, she was just a weak, trembling soul, and she was trying so hard to mask it;

A smirk appeared on his lips as a thought came into his mind; ''Whatever I want? ''

He asked again and Tiana replied immediately without a second thought;

''Yes, Mr. Nicklaus, whatever you want. ''

''Alright then, I want you to strip yourself and go lie down on the bed. ''

He did not have any thought of touching her; he just wanted to see her reaction. But what Tiana did next shocked him.

Xia Zhijun got the title ‘study god’ after scoring first place in the whole city. He’s the model of a good student in a teacher’s eyes: good grades, good manners, and quiet. When he wasn’t smiling, his entire body emits a cold abstinence aura. The girls only have the guts to look from afar and not get close.
Later, it was rumored throughout the entire school that even the study god would fight and hit on girls. Whoever dared to provoke his girl, he would teach you how to be a person at every minute. The night of the graduation ceremony someone saw him blocking Gu Siyi in the corner. He didn’t stop kissing even when she cried. He bit her lips and said in a raspy voice, “I’m going crazy…”
During college finals, Gu Siyi almost bursted out crying, “I’m such a failure. I won’t be able to find a good job in the future…And if I can’t find a good job, I can’t provide for myself…”
Xia Zhijun played with her pink earlobe and remarked, “I’ll take care of you.”
After they graduated, Xia Zhijun created a research company and Gu Siyi became the boss’s wife.
The commercial rocket, “Star of Siyi” was successfully launched. So everyone knew that the new technology superstar, Xia Zhijun has a wife who he spoils a lot.

- Description from Novelupdates

The fiancée has betrayed, but how could she know that the man she looked down upon was in fact a prodigy with healing and martial prowess!