1girl armpits bikini blue_eyes bottle breasts collarbone commentary_request covered_nipples cowboy_shot front-tie_top grey_hair hand_on_own_head hand_on_own_stomach highres innertube kosegawa_shiromi looking_at_viewer lying medium_breasts microskirt navel on_back open_mouth panties saki short_hair side-tie_bikini_bottom side-tie_panties skirt solo striped striped_bikini swimsuit tube underwear water_bottle wet yamaori_(yamaorimon)