1girl, arms_behind_back, blade, bound, bound_arms, breasts, bridal_legwear, earrings, floating, full_body, grey_background, head-mounted_display, jewelry, long_hair, mecha_musume, mechanical_tentacles, navel, oota_youjo, original, plantar_flexion, pointy_ears, revealing_clothes, science_fiction, small_breasts, solo, tube, white_hair