takanashi (takanya shi), akiyama mio, k-on!, 1girl, bass guitar, black dress, black eyes, black hair, blush, bow, dress, fender jazz bass, frilled dress, frilled hairband, frills, hairband, holding, holding bass guitar, holding instrument, instrument, long hair, looking at viewer, marshmallow (site), official alternate costume, parted lips, red bow, simple background, solo, upper body, white background