Toaru Majutsu no Index: New Testament - Volume 18, Chapter 1: That Which is Necessary to Survive - X.

When he woke up, Rono traveled to the world of pirates.

I thought I could live happily and peacefully.

But the appearance of Tianlong people broke this situation!

Rono, watching his parents being shot to death by Tianlong people!

Under extreme anger, Rono awakened the system and vowed to kill all the Tianlong people!

From then on, a [Extremely Evil One] who specialized in hunting Tianlong people was born!

Wherever Rono went, the Tianlong people shivered!

Admiral?

Two more and I will kill all of you rubbish!

Karp: The Evil One?

He is a monster created by the Tianlong people, and one day the Tianlong people will pay for it!

Roger: 【One Piece】?

Compared with [The Evil One], it’s nothing but a cloud!

Whitebeard: [The strongest man in the world]?

No, no, Rono is the strongest!

Rocks: In terms of killing Tianlong people, Rono is the first, I am second, everyone else is garbage!

- Description from novelbuddy

[WARNING: MATURE CONTENT, DARK THEMES]“I will tie you to the bedpost and fuck you like a dirty little slut. Our bodies will meet in perfumes and in sweat until you're screaming for mercy from me… your big bad fuckable lord and Alpha.” He vowed and my face seared with humiliation.Wasn't it laughable that I was not humiliated because of his words, but because of what the thoughts that lingered at the back of my mind were?I wanted every bit of it. The crazy wild sex, the toxic bond… somehow—the sound of them set my soul on fire. I wanted them all.____Phoebe Skywalker is a humble maid in the mansion of the Prestigious Blue Moon’s Alpha. When she is chosen as the Moon's Chosen who is destined to mate with the Alpha, no one expected this taboo as only elites were allowed to become the Luna.Unable to tolerate this humiliation, the arrogant Alpha rejects her. But the Alpha Council intervenes, forcing him to mate with the unlikely chosen one.Phoebe becomes the pack’s Luna but Alpha Kaene would never open his heart to her… or so he thought. When he tries his best to intimidate her, promising her unending nights of merciless lovemaking, Kaene doesn't expect the feisty side of Phoebe that he soon comes to discover.The taboo Luna shocks everyone as she not only shines in conquering enemies but also in stealing the heart of the stoic Alpha Kaene.

An ultimate warrior, the one and only Alchemy Emperor, Ling Han, died in his quest to achieve godhood. Ten thousands years later, he, with the ‘Invincible Heaven Scroll’, was reborn in the body of a young man with the same name. From then on, winds and clouds moved as he set himself against the uncountable geniuses of this new era. His path of becoming a legend has begun once more. Of all eras underneath the heavens, I am the strongest!

- Description from Novelupdates

Xiao Ze, who was dedicated to the people and vowed to become a generation of Ming Jun, accidentally fell on a little lady.
The little lady was born beautiful and lovable.
So Xiao Ze accepted his life and got the name of fear.

ps:
①The male protagonist has no concubine, and he is dedicated to serving the country.

- Description from novelbuddy