I Am The Madman Of This Family - Chapter 1: I’m the Crazy One In This City

No NTR-IncestA Boy struggles with the problems of being raised in a family full of lewd older women.

Summary Version 1:

The mysterious boy Ling Chen is saved by a little girl as he lay on the street dying. Years later, he strikes a deal to save this savior-turned sister and enters the virtual world. In a future Earth where advanced warfare has forced nations to settle issues virtually or else suffer the consequences, Ling Chen bursts into the scene and goes from unknown to legend. Yet all is not as it seems, for Ling Chen has a dark past, and there is a greater mystery at hand behind this virtual world.

Summary Version 2:

To save his terminally ill little sister, Ling Chen enters the newly released virtual game world and joins a small gaming studio comprising entirely of women. From now on walking upon his path towards the pinnacle. An ancient, evil item almost forgotten by history, the “Lunar Scourge” helps forge his unsurpassable legend, and causes him to unknowingly step upon a path that is destined to be punished by the heavens, the way of the shura.

A ritual gone wrong gave him the world's deadliest Class—now all he wants is blood.Zeth stole the most powerful ritual magic in the world from a mad cultist. A Class that's fueled by the blood of his enemies and human sacrifice. One that's illegal to use, punishable by gruesome death. And now that he has it, he's faced with a choice: hide away for the rest of his life from those who would hunt him down, or embrace the power, becoming the hunter to get revenge on the murderer that stole his friends' lives.For Zeth, that's no choice at all.His enemies have to die. And he plans to use every drop of blood, eldritch ritual, and demonic summoning he can to kill them.

Rebirth in 2009, but this rebirth posture seems a bit wrong.

In this life, the family is wealthy, Wang Ye is addicted to the Internet, and can stay up all night the day before the college entrance examination.

Helpless, Father Wang decided to send Wang Ye to serve as a soldier in the army to quit Internet addiction.

two years later…

When Dad Wang made a video call with his son and was about to ask him when he would be discharged from the army and come back to inherit the family business.

Wang Ye, who was dressed in the uniform of an officer, directly surprised Father Wang.

“Dad, I’m going to be a general in the army all the time, so what, in terms of family business, why don’t you and mom consider having another one?”

……

- Description from novelbuddy