The film is based on the 4 real shoe-polish boys of Goregaon Railway Station, Mumbai, who earn their daily bread and butter by polishing shoes at railway station. Their lives are full of struggle and hard work, where there is a limited scope for happiness, but even then they try to keep themselves happy. After dealing with their day-to-day problems, they still have to face a very big problem which goes by the name "Sunday", which in turn make their lives hell. That is the reason these shoe-polish boys often say, "Yeh Sunday Kyun Aata Hai".—Manzar Gul Wazir