I Love Destroying Worlds' Plot - Chapter 1108: 17.35 Fourth Violet Star - Cleaning up Planet Terra

The Immortal Path led to Longevity and Sovereign was heading in ease. When the Longevity was no longer in ease, all living beings were just prisoners. Conspiracy, internal strife, and the invasion of the others, all of it emerged together. 

In such a world, there was such a young man. He made his way upstream, stepping on blood, defying the emperor, destroying the various kings, and slaughtering his way through the hundred clans to form an Immortal Path towards the throne of Sovereign! The Immortal Path was endless, while the Sovereign was limited. He used his blood to forge his immortal legend.

- Description from Novelupdates

Side story of Kyoukai Senjou no Horizon bundled with the first press release of the 1st, 3rd, 5th and 7th Blu-ray volumes of both seasons of anime.

This side story follows Asama, Kimi and Mitotsudaira aboard Musashi one year before the beginning of the main story, as Asama is considering to create a music band together with her two friends for the next festival in Aki, a territory under the governance of K.P.A. Italia.

It was the best of times, it was the worst of times.

—— Dickens《A Tale of Two Cities》

I made myself a ghost back to life from death, with hatred in my bones and conspiracy brewed for years, sinking into the marsh, into the abyss. All I want is to bury the rotten roots, growing thistles and thorns which can kill like upas, to stab into the hypocritical civilization.

In the bottom of the muck……I found my lucida.

- Description from Novelupdates

There was a Senior Brother and a Junior Sister. One of them was transmigrated to this world and had cheats while the other was the reincarnation of a Great Emperor.