1girl, bare_shoulders, bikini, black_bikini, blue_archive, blue_hair, breasts, cleavage, collarbone, cowboy_shot, dano, frilled_bikini, frills, halterneck, long_hair, looking_down, navel, off-shoulder_bikini, off_shoulder, official_alternate_costume, red_eyes, serika_(blue_archive), serika_(swimsuit)_(blue_archive), solo, stomach, strap_gap, string_bikini, sweatdrop, swimsuit, thighs, twintails, very_long_hair