1girl, ass visible through thighs, black gloves, black leotard, black thighhighs, blonde hair, blush, breasts, breasts out, brown eyes, cockpit, covered navel, elbow gloves, fingering, gloves, grabbing own breast, groin, headgear, highleg, highleg leotard, leotard, loli, makigai, masturbation, mecha musume, nipple tweak, nipples, open mouth, original, short hair, small breasts, solo, standing, thighhighs, thighs, trembling, twintails, window