After Taken as a Prisoner of War, the Vampire Queen Turned Me Into a Vampire and Made Me Her Daughter - Chapter Prologue

【Host, host! I might be late, but I, the Femme Fatale Conquer System, am here to accompany you!】

【Now, let’s first conquer Momoana, a legendary female emperor who boasts looks and wits.】

Shu Yichao: “Charge, my nomads! Show them our unrivaled archery!”

And so, Momoana died.

【My host, I’ll assume what happened earlier was an accident. We have to succeed for the next one. Our next conquer target is Purin, a lofty and cold sorceress.】

Shi Yichao: “Clear the mobs and stack skeletons! I shall bring the undead calamity upon the world!”

And so, Purin died.

【…Maybe you didn’t hear me clearly, my host. I said court her, not cull her. Our next target–】

Shu Yichao: “Build the hive and spam the worms. My hive mind shall devour the world! Who can compete with me?”

【…】

Shi Yichao: “Halleluyah! I have finally gotten rid of every single one of them! Speaking of which, System, it has been a long time since you last spoke to me?”

【I’m tired. Just go and destroy everything.】

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.

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.