異世界帰りの剣聖は、自分の実力に気がつかない　～SSSランクの隠しクエストを受けて帰ってきたらレベル１のF級探索者になったけど、異世界で鍛え上げた剣術が強すぎて王女やS級英雄たちが俺を放ってくれません (Associated Names)

Yuta Akizuki, a bottom-tier explorer, one day accepted the hidden SSS-rank quest “Birth of a Hero” and was summoned to another world. He successfully saved the world and returned, unaware that he now possessed the power of the strongest class. Oblivious to his newfound strength, Yuta astounded those around him with his unconscious abilities. As…