I’m Sorry For Being Born In This World! - Chapter 67. Eternal

Xia Yuqing is a shut-in+fujoshi from the 21st century. After an accident, she transmigrates into the body of a young princess forced into a political marriage to another country.

Battle Emperor Fu Sheng is the most popular player in the game, The New Age. Everyone believes that only he will become the champion in the final battle! His real name—Lin Jie. The reason for his participation in the battle is to win the Capsule of Revitalization for his injured mother and sister. With the Broken Blade, a Heritage weapon, in hand, he finally makes it to the final battle! Only then does he realize that his best friend had betrayed him! After his devastating defeat, Lin Jie is shocked to realize that he had time-travelled all the way back to a few years ago when the beta version of The New Age was just about to launch!

With all my knowledge of the game…
Pros on the leaderboard? All of them my underlings!
First kill of a BOSS? Mine!
First clear of the exclusive dungeon? Still mine!

Whatever I lost in the past, I’ll get them all back!
Whoever brought me trouble, you’re as good as dead!
When I have the chance to do it all over again, I WILL BE EMPEROR!

I am Fu Sheng, the STRONGEST warrior in The New Age. No one, absolutely no one, can stand before me!

- Description from Novelupdates

This is a prequel to the anime movie To Aru Majutsu no Kinsho Mokuroku – Endymion no Kiseki.

Just before the completion of the Academy City space elevator “Endymion”, the main characters Kamijou Touma and Index encounter a level 0 girl named Arisa. The Magicians are after Arisa, and they attack Academy City. A female leader named Shattoaura leads a unit from Academy City against the attack. Kamijou and Index learn from Stiyl that Arisa is key to a brewing war between the sides of Magic and Science. When science and magic cross paths, the story begins with Endymion as its stage!