Bremen 4: Jigoku no Naka no Tenshi-tachi

Coda the cat, Allegro the dog, Largo the donkey, and Minuet the chicken are ordinary animals whose lives are transformed after they rescue Rondo, an extraterrestrial visitor traveling on a mission of peace. In gratitude, Rondo gives the four companions technology that allows them to assume human forms.

Their new bodies lead them into a city consumed by war. Confronted with violence they can barely understand, the four friends try to preserve their compassion and help those caught in the conflict, becoming unlikely angels in a place that seems to have forgotten peace.