Veilbreaker! Oops I Bleed Again - Chapter 20: Guilt

Three Emperors have died in quick succession. The prince whom nobody had taken notice of unexpectedly succeeds to the throne. He is quickly plunged into layers upon layers of danger. The Empress Dowager dislikes him, wishing to install a younger, more obedient Emperor. His half-brother dislikes him, accusing him of stealing the throne that is rightfully his. The palace attendants and servants dislike him, believing that he is not a true Emperor. The Child Emperor must save himself.

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

“You shouldn’t be so self-centered. You’re lucky that Mr. Mu wants to marry you. You have no right to turn him down!” Bei Shuo felt cold on the inside after hearing what her father said. Having gone missing when she was a child, Bei Shuo was found a month ago. Before she found her biological parents, she always thought she’d have a loving family. However, when she finally returned home, she realized they had adopted another girl long ago. After more than a decade, the girl had replaced her completely. Her parents, her brother, and her fiance…

The Bei family never showed her any form of affection. On the contrary, they wanted her to marry Mu Ci for their own benefit after she had just returned. Everyone in the city knew that Mu Ci wouldn’t live long. Besides, he had an aggressive personality. Anybody who offended him would suffer badly. Bei Shuo would probably end up dead without even knowing what caused it. Hence, when she married Mu Ci, everyone in Empire City waited for news of the horrible ending. To everyone’s surprise, she actually cured him, and he even ended up pampering her! At the same time, it was revealed that Bei Shuo was actually the disciple of a miracle doctor, a top-tier hacker, a champion racer, and the founder of an international fashion brand…

On top of that, wealthy tycoons, talented directors, and e-sports professionals all spoke fondly of her. “Everyone, please allow us to introduce our favorite junior!” The man who was rumored to be cold and violent pressed his head against Bei Shuo’s shoulder when he found out about her countless identities. “How many more identities do you have?” he asked with a pout. Bei Shuo ran her fingers through his hair and smiled. “There’s only one left, and it’s the most important one. I’m still Mrs. Mu!”

Zavier met Cosmic Consciousness after his death. He was satisfied with every system that Cosmic Consciousness exhibited, so he wanted all of them. Surprisingly, the Cosmic Consciousness obliged him.

Zavier was reborn in an isekai full of magic and alchemy. Now, he had many routes to upgrade. Interestingly, to coordinate these systems, Cosmic Consciousness gave him the gift of being able to duplicate himself. He could clone a finite number of himself to manipulate these systems.

Magus, Alchemist, Mesmer, Tamer, Hunter, Vampire, Werewolf, Dragonknight, Necromancer.....

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By the way, it wouldn't appear NTR or some bullshit harem of courtships. MC of course will have harem but not for cliches.