1girl, black_one-piece_swimsuit, blush, breasts, competition_swimsuit, elf_(stroll_in_the_woods), fate_testarossa, large_breasts, long_hair, looking_at_viewer, lying, lyrical_nanoha, mahou_shoujo_lyrical_nanoha_strikers, on_side, one-piece_swimsuit, solo, sweat, swimsuit, thighs, white_background