Elf Tensei Kara no Cheat Kenkoku-ki - Chapter 5Book 1: -1: Camping at Night

This is the tale of an earthling, who transmigrated as a dying third-rate god but somehow rose through the ranks, gaining followers and eventually causing the Fourth Great Apocalypse.

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will. 

Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again. 

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Song Xuanhe transmigrated into a book called “The President’s Seven Boyfriends”. He became the President’s cannon fodder ex-boyfriend, Song Xuanhe.

The Song Xuanhe in the book: 180 cm tall, so attractive he would trump over even the hottest celebrities, three generations of family in business–a very appropriate rich third generation.

It wasn’t a loss to transmigrate into this kind of person. It was just that this was a rebirth story.

The Song Xuanhe in the book abused the male lead 800 times and had even indirectly caused the male lead’s death. Faced with the reborn blackened male lead, his fate was obvious–not only did he reach rock bottom, he even died without an intact corpse.

Right now, he had become the cannon fodder ex-boyfriend that was foreordained to die without an intact corpse.

——

System: Don’t you think that the male lead has been a bit strange recently? It’s like he’s plotting something in the dark.

Song Xuanhe: Plotting how to kill me?

System: No, plotting how to eat you.

——

Song Xuanhe, who was lying on the bed with an aching waist, pained back and legs suffering from cramps, cursed the System 800 times–what happened to the male lead being a shou?!

Emphasis: Xiao Yuanmu is the gong! Xiao Yuanmu is the gong! Xiao Yuanmu is the gong! Moreover, the big shot has always been a gong! Spoilers only up to here!