ukai saki, hatsune miku, kusari no shoujo (vocaloid), vocaloid, black legwear, grey legwear, absurdres, highres, 1girl, absurdly long hair, anniversary, aqua eyes, aqua hair, aqua shirt, bare legs, birthday, black shoes, black skirt, blue eyes, blue hair, blush, collared shirt, female focus, full body, green eyes, green hair, hand on own chest, happy birthday, long hair, looking at viewer, matching hair/eyes, miniskirt, necktie, office lady, own hands together, parted lips, plaid clothes, plaid skirt, pleated, pleated skirt, red necktie, shirt, shoes, simple background, skirt, smile, solo, twintails, very long hair, white background