砂上走行訓練
昭和から続く足腰をいじめて鍛える伝統的トレーニング
masterpiece, best quality, extremely detailed, anime, 1man, male focus, solo, Short hair, black hair, thick eyebrows, strong eyes, strong muscles, large chest muscles, strong arms, white headband, black long pants, barefoot, bandage on arm, fearless smile, beach, running, footprint,