2girls, bare_shoulders, bed, breasts, city_lights, cityscape, cleavage, clenched_teeth, comic, curtains, dress, drill_hair, emphasis_lines, greyscale, hat, indoors, matara_okina, monochrome, multiple_girls, night, no_headwear, open_mouth, shaded_face, strapless, strapless_dress, teeth, touhou, warugaki_(sk-ii), window, yakumo_yukari