Ghost in the City: Cyberpunk Gamer SI - Chapter 112

[2018 hottest fantasy serial] He is the number one genius, betrayed and murdered by the woman he loved most on his wedding night, reincarnated into a bullied and ridiculed wastrel young man.Wastrel? Genius? What a joke, who dares to call themselves a genius in front of me, Lin Fan, in the Nine Heavens and Ten Realms!Blocked meridians, born unable to awaken martial soul? I have a universal imaging system, able to imprint any martial arts techniques just by watching and become self-taught!

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

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

Lyle Walt is a young noble boy and heir looking forward to the day he can inherit his family’s territory. Except around when he was 10 year old, his parents started neglecting him more and more in favour of his little sister, Celes.
On his fifteenth birthday, he is challenged to a duel by his sister to see who will inherit the household and horribly loses, being cast out of his family. Afterwards, he gets treated by the family groundskeepers and receives the family heirloom Gem from him that Lyle’s grandfather had entrusted to him. From there, he begins an aimless journey with his childhood friend and former fiancée, Novem, and the Gem-turned-Jewel that houses the memories, personalities, and Skills of seven of his ancestors.