One Piece: Supreme Check-In System - Chapter 53: Law and Bepo Rescue

He was very happy to be reborn, but why was he sixteen again, he can’t bear to look back at that time.

Why does he return to being sixteen years old, yet still meet Doomsday?

It’s alright to encounter the end of the world, so why did he have to fall in love with someone?

Even if he falls in love with another person, why did it have to be a man?

Falling in love with a man is also alright, so why did it need to be a secret one-sided love?

Even a secret and unrequited love is alright, so why is that man his….

- Description from Novelupdates

The discovery of the so-called dimensional world heralded a new era for humanity.

This world, populated with lifeforms of ever-increasing strength, would soon become known as a treasure trove for those hunters willing to brave its risk.

Soulshards and gene fragments obtained by killing such lifeforms could be assimilated into their bodies, transforming them into genetically enhanced fighters and setting the stage for the age of genetic enhancement.Zhang Lie, a seasoned fighter who had once explored the fourth of the five known realms of the dimensional world, finds himself thrown back into his youth, to the initial heyday of exploration and growth, before the secrets of this new world had been mined and revealed to all.

Armed with foreknowledge, Zhang Lie will blaze a path for humanity to the stars—and beyond.

……………………………………………………………

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The scum’s or villain’s long road of transformation was tentatively set to the world:
The abandonment of the educated youth’s wife (Completed)
The hidden marriage of the scum film emperor (Completed)
The best brother in the world (Completed)
The Phoenix male who destroy the bridge after crossing the river (Completed)
The treasonous general (Completed)
I’m an honest man (Completed)
To become the top scorer in the School of Agriculture (Completed)
The soft rice man’s self-cultivation (Completed)
The whole world is reborn (Completed)
I want to survive on a desert island (Completed)
The stallion male who has seized the opportunity (Completed)
The perverted self-salvation (Completed)
The spring of the loafer (Completed)
The misplaced life (Completed)
The miser career (Completed)
The ghost is out of feeling (Completed)
The Queen’s favorite husband (Completed)
The vicious girl with her godfather (Completed)
I want to be a good person (Completed)
I does not tear up the family (Completed)
The perverted common plant (Completed)
The Mary Sue’s men (Completed)
Every time I was reborn, someone wants to kill me (Completed)
The old people’s counterattack path (Completed)
The global evolution (Completed)
When I became a net red (Completed)
For you, good person (Completed)
His heart had white moonlight (Completed)

- Description from Novelupdates

It was an era of war unlike ever seen before in Murim history.To end the horrible war, numerous heroes had sacrificed their lives and disappeared on the battlefield.This is the story of a man that longed to be a hero and the story of his brilliant rise to the top.***Joo Seo-Cheon is a man who luckily survives the Warring Era and becomes the Hwasan sect’s elder, only to live a life full of regrets and doubts.He lays on his deathbed waiting for the inevitable when he is returned to the past…