Re:Zero Kara Hajimeru Isekai Seikatsu - Chapter 66Arc 7, - “Hiain Yatz”

A young boy genius, Suo Jia, is a water mage who dreams of being a warrior travelling the great and dangerous trade routes to find his lost father that set off on them before Suo Jia was born. Having to look after his sick mother, Suo Jia manages to find a way to solve all their problems, as well as make a name for himself. He gathers nobility, vast wealth, items of great power, knowledge lost to the ages, and exceptionally talented females around him as he plots and plans – preparing to set off on an epic journey that will go down in history as a new legend. However, will others that depend on his powers so much be willing to let him go on such a dangerous journey so easily?

- Description from Novelupdates

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 protagonist wakes up to a superpower one day, out of the blue! But there’s no organization targeting the protagonist’s superpower! The prettiest girl in his grade doesn’t turn out to be a psychicer like the protagonist himself! No door opens to another world and he doesn’t get summoned! There is no secret history in the protagonist’s past! There is no reveal explaining the protagonist’s sudden attainment of his superpower! So normal! Such overwhelming normalcy! He graduates from school and gets a job without anything happening! He lives as a mediocre working adult! Having enough power to fight against all of humanity yet not seeing anything happen finally makes him snap! Fine, be that way! If this is the way it’s gonna be, then I’ll make it! I’ll make the secret supernatural organization myself! Welcome to my manmade extraordinariness!

The Baron’s daughter, Alessandra Barrett, has worn a mask from a young age due to an injury. Many say if you were to see the face behind the mask, you would be cursed and die soon afterward. She is seen as a ghost, avoided by all who visit the baron’s home until she becomes the Duke’s wife.

No one could understand why the Duke would pick such a wife. Did he wish to die?

What would become of the girl who once hid in the shadows but now had the spotlight on her as the Duke’s masked wife?

What would everyone say if they were to learn the truth that she was in a contracted marriage with the Duke?