Shakugan no Shana Zero

Invaders from the Crimson Realm have descended upon Earth looking for something called the Power of Existence. Whoever possesses this power will control the very fabric of existence. To the rescue comes an otherworldly young girl with fire in her eyes. She may be cute and petite, but she's endowed with enough preternatural strength to save the entire universe. Plus, she's got a really big sword! (Source: VIZ Media)

This is a collection of short stories that fans must read to enjoy episodes that were not depicted in the main story! (Source: Dengeki Bunko, translated) *Note: Originally concluded with three volumes on 2012-11-10, a fourth volume was released on 2023-11-10.*