My Status as an Assassin Obviously Exceeds the Hero’s - Vol. 3 (Manga)

THE SHUNNED CHILD

Hunting for the strength to avenge his murdered friend, Akira sets his sights on reaching the bottom of an ancient labyrinth. There, Akira discovers a huge, talking black cat—a servant of the Demon King and unexpected ally. After they form a pact to join forces, a magic circle whisks Akira away to the home of his new companion Amelia, the land of the elves. There, unexpected secrets about Amelia’s history come into dangerous focus!

(Source: Seven Seas Entertainment)