Ruby's clothes are ash

Dust is a rather strange and miraculous substance. So many different types that have many different types of effects. The powers of fire, lightning, water, earth, and even gravity, all contained within tiny little crystals. Generally when Dust detonates its resulting explosion results in a large burst of whatever element is imbued into the Dust. Such as Fire Dust creating a large burst of fire.

Unfortunately for Ruby Rose, Weiss Schnee kept a very large variety of different Dust in her luggage for use in her weapon. And when different types of Dust interact, weird things start to happen.

Ruby's sneeze was just the spark needed to detonate the particles of Fire Dust in the air. The burst of fire expanded and engulfed Weiss's luggage containing many different kinds of Dust. Normally this would not be cause for concern since Weiss had very diligently packed and sealed her vials of Dust away in accordance with the Dust safety guidelines instilled into her throughout her life. A small burst of fire would not be able to get inside the sealed glass. Unfortunately Ruby's violent collision with Weiss's luggage had knocked the careful packing loose, spilling a vial of Lightning Dust.

Fire met Lightning. The explosion traveled into the vial and detonated it like a grenade. This caused more vials to shatter and their various contents to explode as well. What would normally be a small explosion turned into a small bomb with Ruby Rose standing right next to it.

Luckily, Ruby was protected by her Aura, the soul **** field easily protecting her from harm. But the sheer variety of Dust within the explosion did something that no one could predict.

Ruby's Aura protected her from harm. Other than some ash and black scorching the girl was completely unharmed. But that protection was only skin deep. Everything else was destroyed. Her dress, pantyhose, boots, socks, and cloak were reduced to ash in an instant. No longer having a belt to clip onto, Crescent Rose, which had come through the explosion somehow completely intact, clattered down to the ground.

Ruby stared down at her now bare body in shock. Weiss starred at her as well her face swiftly coloring red both from feeling embarrassed the younger girl was now naked and anger that her dust supply was gone.

"My clothes!" Ruby cried as she swiftly moved her hands. Quickly she positioned one arm across her small breasts while the other shielded her pussy from the view of the increasingly reddening heiress.

"My luggage!" Weiss yelled. "Do you have any idea how much that amount of Dust cost you dolt?!"

Ruby blushed and began to hurriedly look around. While none of them was close, the grounds were full of students heading into the school. A good few were looking her way, curious from hearing the explosion. She could see a few pointing at her, no doubt commenting on how she was naked.

This was not good. First her underwear was stolen and now she was completely naked in the school courtyard in front of all her prospective classmates! And to make matters worse this white haired girl was still yelling at her. This was the worst first day of school ever!