Half Girlfriend is a love story from the pen of Chetan Bhagat. The book belongs to the category of young adult romance. This is the story of a Bihari boy named as Madhav. Madhav is a man who has come from a remote village of Bihar and does not speak English. However he took admission in an English medium school St. Stephens College.
Here he fall in love with a girl who comes from completely a different society. Her name is Riya. She is a girl who is rich lives in Delhi and has studies in an English medium school from her childhood. Still having so many differences, destiny make them come close to each other. They become quite close and because of which Madahav started to see Riya as her girlfriend.