1girl, ahoge, arknights, black_jacket, black_nails, black_pantyhose, breasts, electric_guitar, guitar, instrument, jacket, long_hair, looking_at_viewer, lying, official_alternate_costume, on_back, open_clothes, open_jacket, pantyhose, pointy_ears, red_eyes, red_hair, red_shirt, saiko_(saisaka), shirt, single_leg_pantyhose, small_breasts, smile, solo, upside-down, vigna_(arknights), vigna_(black_wave)_(arknights)