All four films are Selvaraghavan directorials, but 'Aayirathil Oruvan' (2010) is the only one without music by Yuvan Shankar Raja. Kaadhal Kondaen, 7G Rainbow Colony, and Pudupettai all featured Yuvan's music and formed their acclaimed collaborations. Aayirathil Oruvan instead had music by A.R. Rahman and G.V. Prakash Kumar, making it the odd one.