Stico (1985)

Leopoldo Contreras (Fernando Fernán Gómez) is a burnt-out university professor who convinces a married couple to take him on as a live-in servant, in exchange for room and board. The absurdity of this supposedly serious proposition only worsens when the "servant" discovers he has $200,000 in royalties due from his books, and so his situation will somehow have to change. With these premises for starters, anything can happen next.