Teihen Hunter ga "Return" Skill de Gendai Saikyou: Zense no Chishiki to Shinimodori wo Kushi shite, Jinrui Saisoku Level Up  

The Bottom Hunter is the Strongest in Modern Times with His "Return" Skill, 底辺ハンターが【リターン】スキルで現代最強 ～前世の知識と死に戻りを駆使して、人類最速レベルアップ～, The Bottom Hunter Is the Strongest in Modern Times With His [Return] Skill

In this story, monsters emerge from portals and chambers, and our protagonist, Asuto Yuuki, discovers his latent abilities as a hunter. Despite his best efforts, his "Return" skill remained dormant until he encountered his impending demise. Driven by his desire for power and his commitment to saving his city from impending doom, Asuto harnesses his "Return" ability to enhance his skills as a hunter.