1girl, armpits, bikini, blue_archive, blue_sky, cloud, day, eyewear_on_head, frilled_bikini, frills, hair_flaps, halo, hifumi_(blue_archive), hifumi_(swimsuit)_(blue_archive), light_brown_hair, low_twintails, navel, ocean, official_alternate_costume, outdoors, ribbon-trimmed_bikini, ribbon-trimmed_swimsuit, ribbon_trim, side-tie_bikini_bottom, sky, sunglasses, swimsuit, tomo_(tomosa011326), twintails, water, white_bikini, yellow_eyes