Kuroneko no Kenshi: Black na Party o Yametara S-kyuu Boukensha ni Scout Saremashita. Imasara "Modotte kite" to Iwaretemo "Mousoi" desu

With a magic value of just one—practically zero—Nine is branded as the lowest-ranked adventurer, holding a mere F-class status. Labeled as utterly incompetent, he serves as a vanguard attacker for a party that took him in, enduring endless mistreatment alongside his beloved cat, Enu. Instead of fighting as an equal, Nine and his feline companion are forced to handle every menial chore while being treated as disposable burdens. His patience finally shatters when the party leader callously sells Nine’s black sword, a treasured memento left behind by his father, without permission. To make matters worse, the leader resorts to violence against Enu, pushing Nine past his breaking point. Declaring that he is done, Nine walks away from his toxic companions, determined to forge a new life on his own terms. However, his departure quickly draws unexpected attention. He is suddenly approached by Dahlia of Flash, a renowned S-rank adventurer, who recognizes the hidden potential others overlooked. Before long, Nine finds himself scouted by Red Hawk, the most powerful adventuring party on the continent. The man dismissed as worthless may actually be the strongest adventurer of all, and when his former party inevitably begs him to return, it will already be far too late.