kasa (hitori sanka), original, long image, 1girl, balancing, black eyes, black hair, brown eyes, brown hair, cable, chair, computer, computer mouse, female focus, glasses, headphones, legs, long sleeves, microphone, office chair, own hands clasped, own hands together, red-framed eyewear, school uniform, shirt, short hair, simple background, sitting, skirt, solo, speaker, stacking, swivel chair, thighhighs, what, white background, white shirt, zettai ryouiki