Witch: Accumulate Experience Through The Knight Breathing Technique - Chapter 4: Secret Medicine and Black Gas

Side story of Kyoukai Senjou no Horizon bundled with the first press release of the 1st, 3rd, 5th and 7th Blu-ray volumes of both seasons of anime.

This side story follows Asama, Kimi and Mitotsudaira aboard Musashi one year before the beginning of the main story, as Asama is considering to create a music band together with her two friends for the next festival in Aki, a territory under the governance of K.P.A. Italia.

At the moment of her suicide, she was filled with joy, for her great vengeance had been satisfied, and her wishes were fulfilled.Yet, heaven ordained her rebirth before the apocalyptic world.In her past life, she harbored fear towards his possessive imprisonment.In this life, she depended on him, was infatuated with him, clung to him, loved him.Together, they faced ghostly trickeries and walked through the hell on earth, never to be separated again.

The world ended, seven days of earthquakes, volcanic eruption and then came the meteor storm, bringing something worse—mutation.Now, survivors are group into Shifters, mutated humans and normals.Ava Zhang was supposed to be a Normal. Useless. Disposable.Thrown into a military-controlled bunker, she is sorted into Level Three—the bottom rank, where the weak are left to rot. Starving, overworked, and surrounded by desperate scavengers, she realizes that in this world, strength decides survival.But Ava isn’t as powerless her hidden System activates. The Blueprint System—an ability that lets her design and invent anything, from weapons to high-tech defenses.