The title said it all already. I don't know what to write in descriptions.

A long time ago-when Obi was just a child, possibly , Obi met a red hair who doesn't have any friends. No, it's not Shirayuki it's someone else. Her hair have a blood-like color. And because of that no one want to...

Here's a one-shots book about your fav vanguard characters! Though I'm not the artist of the drawing, CREDITS TO THE REAL ARTIST!! Enjoy!