kou hiyoyo, tsuina-chan, voiceroid, commentary request, >:), 1girl, ahoge, bare shoulders, black shirt, black skirt, black sleeves, brown eyes, button eyes, buttons, closed mouth, collarbone, detached sleeves, drill hair, fang, fang out, grey hair, hands on own hips, long sleeves, looking at viewer, sailor collar, shirt, skirt, sleeves past wrists, smile, standing, twin drills, twintails, v-shaped eyebrows, white sailor collar, wide sleeves, x mouth