Toaru Majutsu no Index - Volume 15, Chapter 4: The Paper-Thin Difference between Self Derision and Pride. Enemy_Level5.

Li Rui had lived to to seventy without any cheat or golden finger. Looking back on his life, he had gained nothing and accomplished nothing. Just as he’s been worn down by the years and resigned to his fate, he unexpectedly awakened the Perfect Life System.“Come on, tell me, how is a seventy-year-old man who’s about to kick the bucket supposed to live a perfect life?!”【You are born with the Martial Bone, and from the moment of your birth, you are destined to become the world’s number one. You gain the talent – Martial Bone.】【At the age of ten, you join a renowned sect and shine in the sect’s grand tournament, gaining fame and attracting the attention of an immortal teacher. You acquire the talent – Divine Skill Mastery.】Looking at 【Gains the favor of an immortal maiden, becoming a divine couple】, he fell silent.“Seventy years old is just the right age to start doing things!”…Many years later.Li Rui finally emerges with the supreme innate Dao fetus, slaying ten thousand demons, breaking ten thousand evils, and ruling over the immortal realm for a hundred thousand years. He is hailed by the world as the Evergreen Immortal Venerable.

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

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.

For a million worth of contract, she became a surrogate mother.

He was the chief executive of the Empire and she was of lowly birth. With her adoptive father’s business falling into crisis, she agrees to his contract.

She gave birth to twins: the older brother is healthy, while the younger brother didn’t breathe out. Fulfilling the contract with a huge monetary sum as the reward, she disappeared from his eyes.

Six years later – he was still the cold high-profile president, but when she is accidentally imprisoned in the cage of his golden birds he pressured her harder and harder: “Woman, do not think you can escape my hands!”

The old-fashioned man: “Mu Yazhe, you’d better leave her alone, this is the child’s mother!” The man becomes frightened, questioning the reason this child’s features bears such resemblance to…