Sweet Waters Throne - Chapter 251 -

Luen transmigrates into a world where he is the sole surviving members of his family. He is informed that almost all of his relatives are dead and his father delivers his final words with his last breath.After his father's death, he finds a special ring with his family patterns on it.When he picks up that ring, “Declare your name”, a voice whispers.“My name is Ethan Polleta, and I will rebuild the family's name.”

A series of short stories in the world of Toaru Majutsu no Index organized into chapters featuring Kanzaki Kaori as the protagonist, going around the world and space doing missions for the Church of Necessary Evil, however, there is more than meets the eye as each incident is connected.

One chapter was bundled with each limited edition release of the Toaru Kagaku no Railgun anime DVD and BDs, with all of them together being equivalent to a single normal Toaru Majutsu no Index volume