Ranbir Kapoor, Karan Johar and Alia Bhatt are teaming up for the very first time on-screen for Ayan Mukherji's superhero flick Brahmastra. But even before the film could go on-floors, there are reports of a possible romance between Alia Bhatt and Ranbir Kapoor. While it's very common in Bollywood for link-up stories between co-stars during their films, we hear that Ranbir is not very pleased this time and is quite upset about the same as he doesn't want to be tagged a 'Cassanova'. Watch video to know more.