Alphie is a half-elf girl living in a world filled with demons, monsters, and magic. Half-elves are treated cruelly and looked down upon by nearly everyone. The only person who ever showed her kindness was an adventurer named Ren. He took her in, fed her, and became like a father to her. When he died, Alphie made a vow: she would destroy all demons and monsters and make the world a better place—just as he had always wanted.