On April 27th, during the protagonist's date with Saki, one of the places they can go to is a cinema to see a movie, specifically a film version of the game Policenauts. The protagonist struggles to follow the film's plot, and finds more interest in watching Saki watch the film. Afterwards, Saki quizzes the protagonist on various parts of the film's plot that she didn't notice or didn't get. This reference was added most likely because this game runs on Policenauts' engine, and that its creator Hideo Kojima was also this game's director.