Riches and Bitches: I have a gate to an isekai and leveling-up system! - Chapter 388 A new aura core in Fay’s womb (r18ish)

Two years ago, the famous teenage e-sports genius, Daylight, accused an opponent of cheating in a competitive game and eventually disappeared from e-sports.

Two years later, the small streamer (ShadowBlade) dominates in an Overwatch match and runs into the super famous streamer, (KangMing).

Kang Ming: Can you shoot me again?!

– YOU WERE ELIMINATED BY SHADOWBLADE –

Kang Ming: Oh.

Then ShadowBlade finally realized: if I want to die, I must do it myself.

- Description from Novelupdates

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

Jiang Pengji got something called the Court Intrigue Stream System.
System: “Your goal is to become the most prestigious woman in the kingdom (the Queen)!”
Jiang Pengji: “Okay, System. No problem!”
Years later, she met the target by becoming the most prestigious woman (the Empress).
Jiang Pengji: “Well done, no?”

- Description from Novelupdates

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.