I Became a Murderer in the Academy. - Chapter 5: A Monster in a Slave Market.

After choking to death on a watermelon, Rong Jiahui thought that she would enter the netherworld and be reincarnated.

But when she opened her eyes, she discovered, to her very horror, that she had returned twelve years into the past…

Looking at the beautiful and awkward “little brother” that would be conferred the title of Marshal in the future for outstanding military service, she almost let out a snort of laughter.

She firmly decided to hug the thigh of this little brother, and climb to the top of her life!

The plan was beautiful, but it had just one problem.

Why had this little brother… suddenly turned into…

A little sister…

- Description from Novelupdates

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

In a world where any normal human could create elements at will, Aziel Mateo came into life and was left in an orphanage.Humans from this world were granted magic by the universe when they turned fifteen years old. These blessed magic users served under the twelve gods.Aziel Mateo, a kid without visible talent found that he also couldn't do magic as he wasn't blessed by the universe.He decided to train himself in order to fill the gap between magic users and himself. However, he still found himself lacking, as the magic users can become stronger with their magic.Aziel Mateo later got admitted in the Academy but felt like an outsider, always being bullied, and rediculed constantly. Still, he continued his training in the shadows, slowly but surely he rose up to the ranks of the strong students without using magic.When everything seem to finally going his way, he was ambushed during their training camp, and left there to be eaten by a beast.However, this tragic event forever altered the course of his life in a positive way.Aziel Mateo survived that ambush and was brought into a cave where he saw a woman, introducing him the magic chest that was full of magic scrolls. The scrolls that contained forgotten arcane knowledge for magic.The woman revealed herself as a goddess who was betrayed. She helped Aziel become stronger for a cause. She needs his help in getting vangeance, in getting the justice that she deserves.Aziel Mateo obtain the ancient arcane powers, and become stronger that he didn't thought he could attain, not even in his imaginations.

Tang Long was brought to the Immortal Cultivation World by an immortal who noticed his affinity to wood and cultivation.
Relying on his amazing talent, became one of the five emperors of that world.
He failed his Heavenly Tribulation and had his soul scattered into pieces but one part found its way to Qin Haodong on Earth.
With his excellent medical skills, he became a divine doctor of traditional Chinese medicine and encountered the baby girl he made before going into the Cultivation World, whose mother was as pretty as a fairy. The little girl even asked him to find more lovers. What a cute girl…