I am that male friend in the harem story - Chapter 6: Did you forget?

“Seven years later, she returned with her baby

”Give me the child, and you can name a price!“

”Spring only sows the seeds. When it comes to autumn, you want to obtain a son. Heh, man, aren't you thinking too simply!“

”If you want me to call you daddy, then you have to show your ability to chase after my mommy. The man that my mommy likes is my daddy! “Otherwise, there's no need to talk about it!”

Kurogami Ichiro was desperate because he couldn’t achieve what he wanted when he once started his martial arts path at age of 8!

Zhao Du'an, a government official leading a cautious life, finds himself transported to another world where he becomes the favored 'pretty face' of a female emperor and an oppressive, power-abusing villain. Before he can relish the moment, he faces mortal danger for releasing a national criminal. Cornered and desperate, he plans to soothe the female emperor to seek mercy, only to discover his 'leading gigolo' role is a sham.Worse still, his notorious reputation prompts officials and heroes alike to impeach and eliminate him; and martial artists and clerical magicians consider him a disgrace. Overwhelmed, Zhao Du'an decides it's better to stop being human to survive.Starting by betraying his allies, he becomes the Emperor's top lackey. Years later, amidst heavy snowfall in the capital, the female emperor Xu Zhen Guan sighs atop the city tower, 'It was supposed to be a pretend companionship, how did it turn real...'Also known as 'Deceiving and Flattering at the Court of Great Yu', 'The Record of a Villain Going White'.

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