Twilight of the Cockroaches

Twilight of the Cockroaches , Gokiburitachi no Tasogare? is a 1987 animeliveaction film written and directed by Hiroaki Yoshida that combines liveaction footage with animation. The plot concerns a society of cockroaches who live peacefully in the apartment of a bachelor named Seito until a woman moves in and the humans begin to exterminate the cockroaches. The cockroaches are depicted through animation, and the humans are depicted through liveaction footage. Famed Japanese illustrator Yoshitaka Amano worked on the film as an art director and character designer.

Source: Wikipedia