RE: Monarch - Chapter 43: Enclave XIII

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.

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.

- Description from Novelupdates

In the general’s house, the eldest daughter is born again.

“Why? Just why?”“Why did I became this guy?” That was the first thing I said when I see myself on the mirrors reflection.Lucien Drelmont.A bottom-tier instructor at Noctis Ardentis Academy. A joke of a character. A corrupt, talentless noble despised by both students and faculty.He was one of the early game villain, that was destined to die, a stepping stone for the protagonist, a scapegoat for the Academy, no matter what way the game is played his death was destined.And now I need to survive as him, in this hellish academy._____________________[No Harem][No Romance][No NTR&Yuri]

The story is about a man whose compulsive tendencies make it impossible for him to keep a job, and a young girl who skips school and loves insects. The two meet, come to support each other in reintegrating into society, and fall in love. There’s a problem, however: namely, the parasites in their heads.