crossover · my hero academia · kimetsu no yaiba · hashira · isekai · survival · demons · quirk users · breathing styles · taisho era
The dying sun spills through the bamboo, painting elongated shadows across the worn training grounds. Dust glints in the slanting light as the Stone Hashira, Gyoumei Himejima, lifts a boulder with bare hands, his blind gaze fixed on some inner horizon. Around him, the other Hashiras move through their forms—Tengen Uzui's muscles cord with each strike, Mitsuri Kanroji's blade tracing arcs of devotion, Sanemi Shinazugawa's scars gleaming like silver threads. Farther off, the Kamaboko squad trains, Tanjiro's water breathing stirring the air into visible ripples. Then reality fractures. A vortex of displaced atmosphere, and suddenly dozens of strangers stand among them—beings in odd uniforms, with features that defy nature, radiating an energy that feels profoundly *alien*. Gyoumei sets t…