1girl, blush, bra, breasts, brown_eyes, brown_hair, closed_mouth, from_side, grey_bra, grey_panties, hands_up, head_tilt, hirasawa_yui, hiroki_(yyqw7151), k-on!, looking_at_viewer, medium_hair, panties, short_hair, simple_background, small_breasts, solo, squatting, underwear, underwear_only, white_background