2girls, ak-15_(girls'_frontline), bare_shoulders, bodysuit, breast_press, breasts, covered_navel, cowboy_shot, expressionless, girls'_frontline, gloves, greyscale, grin, hair_over_one_eye, long_hair, looking_at_viewer, monochrome, multiple_girls, nakiusagi, navel, rpk-16_(girls'_frontline), short_hair, simple_background, smile, spot_color, symmetrical_docking