onoe serika, chaos;child, science adventure, shiny eyes, key visual, official art, promotional art, translation request, 1girl, :o, black dress, black thighhighs, cropped jacket, crosswalk, d-sword, dress, dress vest, glowing, glowing sword, glowing weapon, hekiho academy school uniform, holding, holding sword, holding weapon, huge weapon, hugging object, lying, on back, open mouth, pink eyes, pink hair, school uniform, solo, sword, thighhighs, weapon, zettai ryouiki