Isekai Kaeri no Kensei wa, Jibun no Jitsuryoku ni Kigatsukanai ~SSS Rank no Kakushi Quest wo Ukete Kaettekitara Level 1 no F-kyuu Tansakusha Ninatta Kedo, Isekai de Kitaeageta Kenjutsu ga Tsuyosugite Oujo ya S-kyuu Eiyuutachi ga Ore wo Hanatte Kuremase

Akizuki Yuuta was once nothing more than the weakest explorer, an unremarkable adventurer struggling at the very bottom of his profession. Everything changed when he accepted a mysterious hidden quest that abruptly transported him to another world. What followed was far from a simple journey; his ordinary daily life was instantly replaced by a grueling, relentless struggle for survival. Trapped in this unfamiliar realm, Yuuta was forced into continuous, desperate combat against an endless horde of overwhelmingly powerful monsters. After enduring countless battles and surviving unimaginable hardships, Yuuta finally completed his trial and returned home. However, his homecoming came with a strange catch: despite the years of brutal experience he had gained, his official status had reset entirely, leaving him as a mere Level 1 explorer once again. Yet, while his numerical rank suggested weakness, his body and spirit remembered every hard-fought lesson. He had retained the extraordinary swordsmanship he forged in the fires of the other world, possessing skills far beyond anything seen in his original reality. Now back where he started, the supposedly weakest explorer has unknowingly become the strongest sword saint. Bearing the refined techniques of an unyielding warrior, Yuuta must navigate his everyday life while remaining completely oblivious to just how overwhelmingly powerful he has truly become.