4girls, d, armpits, arms_up, black_one-piece_swimsuit, blue_hair, blue_sky, breasts, cloud, collarbone, competition_school_swimsuit, covered_navel, day, hair_ribbon, kotonoha_akane, kotonoha_aoi, lens_flare, long_hair, looking_at_viewer, multiple_girls, one-piece_swimsuit, open_mouth, outdoors, pink_eyes, pink_hair, presenting_armpit, ribbon, school_swimsuit, showering, sidelocks, sky, small_breasts, smile, solo_focus, standing, swimsuit, taut_clothes, taut_swimsuit, teeth, tying_hair, upper_teeth_only, voiceroid, wakana_hanabi, wet