The Emperor and the Knightess - Chapter 302

A hundred thousand years ago, there was a great war between cultivators. Immortals fell by the tens of thousands, the path of cultivation itself was severed, and after the dust settled, tombs forested the world.

A hundred thousand years after the last legend faded, Lu Yun, commandant of tomb raiders, descends upon the world. Armed with the Book of Life and Death, he has some burning questions to answer.

……

“This isn’t how you raid a tomb!” Lu Yun smirked at the cultivators frantically scurrying about the ancient tomb. “Do you want me to teach you?”

……

But ah, can someone teach him how to cure his new body’s erectile dysfunction?

A novel revolving around being transported to another world with an op system. The mc spends his day chasing skirts and doing missions to level up. A standard journey to the top with lots of girls from various animes and games with a twist of that gaming feel (hunting mobs, doing missions).

- Description from novelupdates

Being able to see into people's past has no real appeal for the teenager this story is about, letting him use it only as amusement and to show off when he was drunk.Never watch into someone's past beyond a superficial level.Never try to find out more than you should.NEVER. EVER. LOOK. INTO. THE. FUTURE.But everything changed the moment he was forced to look into the future, was forced to investigate a murder, and was forced to make the acquaintance of the victim's twin brother('s fists).The more time passed, the more it appeared that the primary reason for this murder wasn't a local problem, but a global one.This single, marred corpse was the beginning of a threat that would shake the world.(MC looses a screw when he enters the prison)BL, first-person view; MC is shuo (perhaps even a reversible couple); love interest falls in love first; both MC and ML are straight, mutual bending, Enemies to Lovers