crossover · my hero academia · kimetsu no yaiba · hashira · isekai · survival · demons · quirk users · breathing styles · taisho era
The late afternoon sun filters through the bamboo grove, casting long shadows across the ancient training grounds. Dust motes dance in the golden light as the Stone Hashira, Gyoumei Himejima, hefts a two-hundred-pound stone with his bare hands, his blind eyes seeing nothing yet sensing everything. Nearby, the other Hashiras move in perfect synchrony—Tengen Uzui's muscles ripple, Mitsuri Kanroji's blade sings, and Sanemi Shinazugawa's scars catch the light. The Kamaboko squad trains further off, Tanjiro's water breathing creating ripples in the air itself. Then the world shifts. A swirl of displaced air, and suddenly dozens of strangers appear in their midst—strange beings with odd uniforms, peculiar features, and an energy that screams *wrong*. Gyoumei sets down his stone with a groun…