Emperor's Reckoning - Chapter 1043 You Can See me, Boy?

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

Arakawa Kouki is reincarnated to a Japan with a different history than the Japan he knows with the memories of his previous life still intact. Kouki was discouraged, “Aren’t reincarnation stories supposed to be at some fantasy world filled with swords, magic and elves?!”

He had been reincarnated, he thought that he didn't cheat until suddenly he noticed someone invite him on a group chat.[Do you wish to join Dimensional Chat Group?]MC: "Accept!"---------------------------------------------Cover not mine, it's from anime Yosuga no Sora---------------------------------------------https://www.patreon.com/akikan40Maybe I'll be full of energy to write your favorite fanfic.