1980s_(style) 4girls armor backless_leotard black_eyes blonde_hair body_blush bracer brown_hair gradient gradient_background habara_nobuyoshi hands_on_own_knees head_rest helmet horns kina_(machine_robo) leina_stol logo_parody long_hair looking_at_viewer machine_robo machine_robo_chronos_no_gyakushuu multiple_girls official_art open_mouth parted_lips pauldrons red_eyes red_hair retro_artstyle rury_(machine_robo) short_hair shoulder_armor sitting sophia_(machine_robo) very_long_hair