But Ganguly clarified that the character is not inspired by Ghosh's life.
"Although Ghosh plays a director, the character is not at all inspired by him.
In fact, the story idea came to my mind after one of my team members, who was a gay, had an untimely death.
I realised what a lonely and psychologically miserable life he had, just because the society found his behaviour and thought process 'abnormal', " Ganguly told.
Ghosh will play a film director, Neel who is in love with his cameraman. But the cameraman is a bisexual and married.
Asked him how he finalised Ghosh for the lead role, Ganguly said: "I met Ghosh some time back and he asked me about my new project.
When I told him the story of Chhaya Chhobi', he was curious to know if I have anyone in mind to play the gay filmmaker called Neel. I said I would love to have you as Neel'.
"There was a long pause and then Ghosh said if I am serious about casting him as Neel, he is ready for it.
I am thankful to him because no one in our Bengali film industry has a better capability to understand human psyche than him and hence he will do justice to the character."
Ganguly wants to give a message through the film.
"I want the society to realise that no individual can dictate another man's life. My film is a love story of two men - one homosexual and another bisexual - where forced loneliness and psychological, physical and social alienation play the key roles, " Ganguly said.
"Neel doesn't have any guilt feeling about being gay. His behaviour is slightly effeminate, but I didn't dress him up like a woman with bangles or 'bindi' or make-up for simple reason - gays are not eunuchs (as they are portrayed on-screen nowadays).
"And, a gay love story is no different from a man-woman love story. As far as I know, this is going to be the first full-length film on gays in India, " Ganguly said.
Raima Sen will play a researcher, while Ganguly's actor wife, Churni Ganguly, will play cameraman's spouse.
The actor, who will play the cameraman, is yet to be finalised.