1girl, ahoge, bare_legs, bare_shoulders, barefoot, beach_towel, bikini, denim, denim_shorts, drinking_straw, drinking_straw_in_mouth, frilled_bikini, frills, innertube, juice_box, legs, long_hair, looking_at_viewer, lyrinne, onii-chan_wa_oshimai!, oyama_mahiro, shorts, solo, swimsuit, towel