A Hentai System in the World of Danmachi - Chapter 15 - 14 - The system answered me.

Corporate slave Alexander dies with only one regret—not finishing the fantasy novel in his hands. Fate has a twisted sense of humor when he awakens as Alexander Flamingo, the perverted villain destined to be expelled and killed in that very story!Armed with complete knowledge of the original plot and a mischievous “Harem King System,” Alexander plans to rewrite his fate. No longer the one-dimensional pervert of the novel, he'll use his future knowledge to manipulate heroes, seduce heroines, and rise from disposable villain to the true mastermind of this world.The system grants him power through every relationship he builds—but can this calculating reincarnator use his second chance to avoid his predetermined death and become the ultimate Harem King? One thing's certain: this story won't follow the original script.

Being able to see into people's past has no real appeal for the teenager this story is about, letting him use it only as amusement and to show off when he was drunk.Never watch into someone's past beyond a superficial level.Never try to find out more than you should.NEVER. EVER. LOOK. INTO. THE. FUTURE.But everything changed the moment he was forced to look into the future, was forced to investigate a murder, and was forced to make the acquaintance of the victim's twin brother('s fists).The more time passed, the more it appeared that the primary reason for this murder wasn't a local problem, but a global one.This single, marred corpse was the beginning of a threat that would shake the world.(MC looses a screw when he enters the prison)BL, first-person view; MC is shuo (perhaps even a reversible couple); love interest falls in love first; both MC and ML are straight, mutual bending, Enemies to Lovers

Zhao Yelan was born as a criminal s*ave and was rescued by the Third Prince. After years of painstaking efforts to put him on the throne, Zhao Yelan became a sycophantic minister whom everyone detested, but he was actually given a marriage by that person to general Yan Mingting, the lone star of Tiansha.

The general caused the death of his father, his mother, his wife, and his dog. Everyone hoped that the general would kill Zhao Yelan as soon as possible.

On the wedding night, Zhao Yelan, who was dressed in red, took out a dagger, his eyes sharp: “What do you want?”

Yan Mingting held his hand tightly, and borrowed his dagger to carve a large character on the head of the bed – – Early.

“You’re weak and frail, get up early every day and practice horse stance with me!”

“?”

The common people thought this marriage was truly wonderful!

They heard that this big minister was beaten every day. He had to repair the roof tiles when the house leaked and also work in the kitchen. He served his husband and was very obedient, and from then on, he didn’t dare condemn people.

Hey, the general was truly mighty!

Zhao Yelan sat lazily by the bed, playing with the dagger, and raised the ends of his eyes slightly: “Where did these rumors come from?”

“From my dog’s mouth.” Yan Mingting, who was in horse stance, patted his thigh. “Madam, please take the seat of honor. You don’t have to get up early tomorrow.”

- Description from Novelupdates

What?! The sticking to her daily, eating her tofu (taking advantage of her ) is a cross-dresser?

Not to mention that he is the Evil Highness!! She had slept beside him, and was touched by him, what a big loss!

Ah–!

Softly on his chest, listening to his pounding, strong heartbeat, her face turned red. Her greatest desire was to be in his arms.

She never dared to dream before, dared not wish for, and thought that in this life there was no such chance. This had been in her most secret heart of hearts, she longed for his warmth, longed for his love.

Even though he had hurt her before, he had given her more tenderness than others.

Being teased, loved, laughed at… had infiltrated into her bloodstream. Love, she did not know when it had taken root, for when she discovered it, it had grown into a towering tree, no longer able to be split open or cut off.

His hug, his warmth, she would not allow him to give it to others. If they were not only for her, she would rather not have them.

- Description from Novelupdates