The second season returns to the story of a man who was once the top assassin on Earth and is reborn in a fantasy world as the eldest son of a noble family of assassins. The goddess who granted him that new life set a single condition: he must kill the Hero foretold to bring about the world's destruction. He combines the expertise of his former career with the secret arts and magic of his powerful new family. Adapted from a fantasy harem light novel series by Tsukiyo Rui with illustrations by Reia, the TV series mixes action, adventure, drama, mystery and romance.