MTL - Start with Batman - Chapter 305 Aliens are coming

Once Gu Qingjiu, she was fortunate enough to be born in the “best” family, ended up having a miserable and unjust life.

Reliving her life once more, Gu Qingjiu chooses to enlist in the military and bear the toughest hardships she has ever faced. Everyone says that she’s the least possible person to join the special forces. However, she manages to prove all of them wrong.

Good-for-nothing? Who’s the good-for-nothing? Is she a good-for-nothing when she can throw all of them onto the floor in a fight? Is she a good-for-nothing when she has results better than everyone else? She’ll prove all of them wrong.

Enter Helian Niancheng, the well-known, youngest major-general in Beijing. A banishment sends him into the basic ranks in a military camp as a new recruit. From then on, he meets a person that makes him dote on and protect at all costs, his beloved. However, his beloved is only focused on fighting and killing. Major-general Helian declares this to be a very bad, a very terrible situation. Yet, Gu Qingjiu merely replies,

“Scram! Lower your gun if you dare!”

She, the “godly doctor” of an assassin organization in 21st century, transmigrated into the body of Yun Family’s abandoned, good-for-nothing Ninth Miss. Good-for-nothing? Then she’ll let the world see what a real good-for-nothing looks like. Summoners are legendary? Nothing is impossible in this world! She’ll become the first Magical Summoner.

Alexander lived—and died—as a wretched, poor virgin, meeting his end as he laid in the hands of his own mother.Stricken by a strange illness, his final vow was a desperate plea: If I’m ever reborn, I’ll attack all the ladies. I'll give my canal desires more attention!Miraculously, fate answers.Reborn into a world eerily similar to his last, Alexander awakens as a Guardian Candidate—a chosen warrior destined to endure trials and serve the gods.But he has no interest in destiny. Armed with divine skills and a frustratingly incompetent and seductive system, he rejects his ordained path, determined to seize this second life for one purpose: conquering women.Now, as a self-aware, unapologetic pervert, Alexander embarks on a relentless quest to charm, seduce, and claim every beautiful woman he encounters.Will his insatiable appetite lead him to the harem of his dreams, or will his reckless pursuit bring another premature end?Join Alexander in this wild, uninhibited adventure—where desire defies duty, and pleasure reigns supreme!

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates