1girl, bikini, breasts, brown_eyes, brown_hair, hand_on_own_head, looking_at_viewer, misaka_mikoto, navel, o-ring, o-ring_top, orange_bikini, parted_lips, short_hair, shou937, sketch, small_breasts, solo, swimsuit, toaru_kagaku_no_railgun, toaru_majutsu_no_index, upper_body