Toaru Majutsu no Index: Genesis Testament - Volume 3, Chapter 4: The Demon Lord’s Young — the_LIGHT.

“Abused and disowned by her family after she was found heavily pregnant, Ji Weixi was forced to leave her hometown with nothing to her name. She returns four years later, only to be caught in a job with Li Shaoling, her stepsister’s fiancé-to-be as her boss.

***

Ji Weixi was holding up a certain body part of the child and aiming it at the toilet.

The tot’s brow eased amidst the gushing. “”Comfy…””

Li Shaoling’s gaze was overwhelmingly icy. “”You are not allowed to touch him there!””

Ji Weixi stared at him as if she was staring at an idiot. “”By what right?””

Li Shaoling glared at her. “”You are only allowed to look at mine.””

Never!!!”

- Description from Novelupdates

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?

Xiao Chen was once a great soldier of Huaxia known for his strange, unique but effective tactics and plans during operations. He would always assume command and orchestrate highly-dangerous missions and would lead his unit to success.

He was known for being a great commander which made his military rank soar, from being a young lieutenant freshly graduate from the academy to becoming one of the youngest general that Huaxia had ever seen.

Sadly though his military career was cut short when he was deeply involved in the older generals politics. He died a tragic death when he was murdered by the men who he trusted so much and considered his brothers.

His soul wandered through the river of time and space still seeking vengeance and was soon swallowed up by a swirling light.

He soon found himself in the body of a monster or that’s what others consider him to be. He had a hulking figure pack with muscles,towering nearly 7ft tall, a pair thick tusks jutting out from his mouth and lupine ears along with the great desire for battle welling up inside him.

He begins his new journey as a green hulking monster or an orc as what his kind was called, a monster born for war and lived for war.

This is the story of a modern sailor who was accidentally reborn as a soldier of the Brazilian Expeditionary Force, and finally became the largest plutocratic family in Brazil by virtue of his foresight.

- Description from novelbuddy