Cthulhu Gonfalon - Chapter 63

Jian Wushuang was reborn in adversity. In order to get his revenge, he began to cultivate Heavenly Creation Skill. With the help of the Heaven defying cultivation method, Jian Wushuang gradually grew into a peerless genius from an ordinary practitioner. With a sword in hand, no one is his match. Using his extraordinary Sword Principle, he killed all his opponents and eventually became number one Sword Master from time immemorial.

- Description from Novelupdates

In chaotic times, one seeks survival; in prosperous times, one seeks fame.Despite being weathered by the vicissitudes of life, the Great Yu Dynasty still found itself in an era of prosperity.In the northwest, a youth trekked nine thousand miles on foot, slaying the Great Demon alone to compete for a lifetime of glory.In Long Lake, an unmatched Grandmaster hurried to the mortal realm to establish a sect, leaving his name to be revered for a hundred generations.In the imperial capital, a saintly figure spread his teachings far and wide, with followers throughout Qingzhou, his legacy lasting forever.Yet within Qingzhou City, in the compound of a family with a long military heritage,there was a child who never engaged in serious pursuits, instead spending his days playing chess, painting, fishing, and playing the zither.Years later—……When the sword rose, dragon smoke stretched for three thousand miles, and a single strike wiped out the cities of nine provinces!Among all the laws of the world, only I, have entered the path.

[Across the Stunning Beast Princess: Phoenix Against the World]

She, First Princess residence’s only legal daughter, yet known as a waste throughout the whole country!

When her cold eyes opened, she is the 21st Century’s most dangerous genius assassin!

When the sickly young miss exposes an edge, she is absolutely brilliant, and countless men and women in the world greatly admire her……

He is the absolute king of the night, cold blooded and ruthless. In troubled times, he by chance meets her, a zither and flute ensemble, since then in heaven and earth, life and death go hand in hand.

- 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