Sometimes office fantasies are the only way to get through the day..."Ugetsu" is the name used in the West for a 1953 Japanese film, Ugetsu Monogatari. It is summarised in IMDb as "a fantastic tale of war, love, family and ambition set in the midst of the Japanese Civil Wars of the sixteenth century." That film involves a lot of fantasy, so does this short film.
Office Ugetsu was directed by Peter Owen Brook and Luke Doolin, who also played a part in the writing. The 1st AD was the incredibly hard-working Patricia Hetherington.
I think we're meant to recognise an homage to the grapefruit scene in Public Enemy (1931), starring James Cagney and Mae Clarke. [Cagney and Clarke were close friends in real life. They appeared in three films together.]