Mountain Sitting Immortal - Chapter 270: Second Mortal Coil.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

When Mikel opened his new eye, the dead opened their doors.Mikel was just an ordinary, troubled teen until an accident stole his sight.When an experimental surgery gives him a strange new eye, he begins to see more than just the world of the living... and the dead.Haunting visions, ghostly figures, cursed relics, and a mysterious blue interface named Doom — speaking in glowing symbols and shifting data — start to rewrite everything he thought he knew about reality.And as the truth comes into focus, Mikel realized he might be a part of something bigger and far more dangerous than he could’ve imagined.Standing between these worlds, survival isn’t guaranteed. Sanity, even less so.[Welcome to Shaman Protocol.Terms and Conditions (and sanity) not guaranteed.]

Kenji had become the Emperor’s right hand man which he always wanted to be. He thought that this position would help him to become one of the most popular and powerful figure in history, He did not know that the newly crowned Emperor considered him as a threat. Secrets were being prepared to deal with this ‘dangerous subject’ who had become too influential to be ignored.“Oh, Dearest brother, I have to congratulate you on your well-deserved hire! How great must it feel to receive a court audience and the special joy of having a sword under your head before the imperial family!” The emperor said warmly.'Oh dearest sister... Your congrats are out of place... you just made the situation worse...'

There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.