Lv9999 no Rettousei: Kaiki Shita Ore wa Josei Saikyou Sekai wo Musou Suru

Ayukawa Haruhito, the final and mightiest Explorer humanity produced, opens his eyes to discover he has been born again elsewhere. In this society, only women descend into dungeons to earn riches and renown, while men are regarded as fragile things in need of shielding. He pursued the profession anyway and was tormented as a failure for it, until the return of his memories brings back the strength he once wielded and lifts him off the bottom.