1girl, ass, beach, bikini, blue_archive, eyewear_on_head, feet_out_of_frame, frilled_bikini, frills, from_behind, halo, hifumi_(blue_archive), hifumi_(swimsuit)_(blue_archive), light_brown_hair, median_furrow, oozumi_03, outdoors, people, peroro_(blue_archive), shoulder_blades, side-tie_bikini_bottom, solo_focus, sunglasses, swimsuit, twintails, white_bikini