Toaru Majutsu no Index - Volume 2, Chapter 2: The Witch-Hunter Moves Along With the Flames. By_The_Holy_Rood...

By coincidence, Li Yunmu found a super machine from humanity’s age of darkness. From that point onwards, his ordinary life would never be the same! Aptitude? Innate talent? What are these? Could they be eaten?

I have neither aptitude nor innate skill, but my shadow can level up using hacks. Experience, Ability points, battle prowess… all of them could be hacked. Even while he is asleep or tired, he could still increase his skills.

- Description from Novelupdates

Traveling through the Xianxia world, Chen Chen got the strongest tracking system and was able to track everything ever since.

Born as twins, but Mu Qiqi was left suffering every torment and became the greatest scapegoat in history only because she was not a better actress than her sister!

Calamity descends upon a a tranquil world in the black of night, transforming it into a death game! This a a true apocalypse, but this is not the end of humanity!

- Description from Novelupdates