CROWN PRINCE'S CONCUBINE - Chapter 618

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

After losing his parents to an accident, Haruto is thrust into a state of depression. Realizing he never had the power to change things, he eventually took his own life. Before moving on, he’s selected by beings greater than his understanding to balance out a world suddenly facing peril. The world of Mordell, where demon-like creatures and beasts roam, and Guilds of ability users called Warlords are the force to combat these creatures. Armed with the power to change things, he has the choice. Continue living in despair or accept his second chance and become a true Warlord.

[Slow Burn]

Died as a virgin. Reincarnated with a big rod.

Ding!

[You have acquired the Bad Luck system. The God of death sympathized with you for dying pathetically. You have been gifted with a divine rod. Your meat rod is the tool you would use to rise to the top. Grow faster and stronger to conquer all the beauties and face the tribulations of the world]

“Eh, where am I? What! A Bad Luck system!” Trying to comprehend what had just occurred as strange characters appeared in his view. Vincent tried to talk and move his body but he realized that he was In the body of a baby.

Vincent Oswald, a popular hentai writer and tentacles creator died as a virgin in a tragic accident and reincarnated into another world.

A dog-eat-dog world, a world of cruelness, a world where you could have your head rolling for a plate of meat soup.

Let's see how Vincent survives in this cruel world and strives for the top as a boy that was born with a silver spoon.

Elves + Demons + Vampires + Yandere + Op characters and so many fantasizing things.

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Note: No NTR towards Mc.

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The MC acts naive and annoying in the early 30s chapters. After that, I can guarantee you a lustful, action-packed piece of work...