1girl, alternate_costume, arms_at_sides, ass, back, back_cutout, black_hair, black_one-piece_swimsuit, blue_background, blue_eyes, blush, border, borrowed_clothes, breasts, closed_mouth, clothing_cutout, competition_swimsuit, cowboy_shot, from_side, hime_cut, long_hair, looking_at_viewer, looking_back, medium_breasts, one-piece_swimsuit, pillarboxed, pink_lips, raika9, saten_ruiko, skindentation, smile, solo, standing, straight_hair, swimsuit, thighs, toaru_kagaku_no_railgun, toaru_majutsu_no_index, tokiwadai_school_swimsuit, twitter_username, two-tone_one-piece_swimsuit, two-tone_swimsuit, white_border, white_one-piece_swimsuit