1girl, ass_visible_through_thighs, bad_pixiv_id, bikini, blue_background, blue_shorts, blush, breasts, brown_eyes, brown_hair, cleavage, collarbone, dresstrip, frilled_bikini, frills, hair_between_eyes, hair_ribbon, hirasawa_ui, k-on!, looking_at_viewer, medium_breasts, open_mouth, ponytail, ribbon, shiny_skin, short_hair, shorts, simple_background, smile, solo, swimsuit, two-tone_background, undressing, white_background, white_bikini, yellow_ribbon