Solo Leveling- Ragnarok - Chapter 52 -

“My unrequited love is over.” Compared to my perfect older brother, I, Ha Giyeon, was endlessly lacking. My first love and my last love—every single one of them were my brother’s friends. What I got in return for pouring all my affection into them were cold, violent words of rejection. Then came the thunderbolt: I wasn’t even their real son. My family, whose love I desperately sought, kicked me out of the house. Even though I scraped by doing hard labor, it didn’t feel like living. Then came the sudden car accident. Right before dying, I regretted everything and begged— That if I ever got to live again, I would never give my love to the family who scorned and discriminated against me, nor to the brothers who tormented me under the pretense of affection. I would live a life that was truly my own. And as if it were a lie, in the winter of my 17th year, Ha Giyeon returned. As Ha Giyeon began to change, so too did the family and the brothers who had once trampled him…

When a glorious old civilization was toppled overnight, a strange purple moon rose and thus began the Purple Moon Era.

Super soldier Su Chen, returned to the city and returned to the city, set off all directions! The king of soldiers that once famous the world, let everyone be convinced!

- Description from xbiquge

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