had died from a train accident, had committed suicide because Virus put too much pressure on him to be an engineer. As Pari, Venkat, and Senthil leave the campus in the middle of a thunderstorm, they come across Ria's now-pregnant sister Shwetha as she goes into labour. Seeing as Shwetha cannot reach a hospital because of the rain, the trio apply their knowledge of engineering to build a makeshift venthouse with the other students. Shwetha gives birth to a healthy boy, much to the delight of the other students. Realizing the fault in his ways and how smart Pari is, Virus lets the trio stay for the final exams and gifts Pari a very rare Space Pen. In the present, Venkat, Senthil, Ria, and Srivatsan reach the school in Dhanushkodi and reunite with Pari. Ria and Pari finally kiss while Venkat and Senthil reunite with him. Srivatsan condescendingly insults Pari's apparent status as a schoolteacher and declares that he has won the bet. When Ria asks Pari for his real name, he reveals that he is Kosaksi Pasapugazh, the inventor Srivatsan's company was trying to sign the deal with. Pasapugazh calls off the deal and reveals himself to Srivatsan, who is shocked. Pasapugazh, Ria, Venkat and Senthil run away laughing while a humiliated Srivatsan chases after them. Cast Vijay as Pappu / Kosaksi Pasapugazh" / Panchavan Pariventhan : He is called Pari. He is a very intelligent student who knocked Silencer in exams, being the topper of the batch. He was having a helping mentality always. He was in love with Riya. Later he left everyone after graduation. Then he is found, after a long searching by his friends, as a scientist and Businessman who runs a school and is partially a teacher too. Jiiva as Sevarkodi Senthil: He is from a poor family with mother as a retired teacher and paralysed father. He was studying engineering to earn a good job and to get his sister married. Later he became a rich Businessman after earning a job. Srikanth as Venkat Ramakrishnan: He is an amateur wildlife photographer. He loved photography but his father wanted him to become an engineer. Later he becomes a good wildlife photographer and had written several books regarding photography. He was in love with Nimi. Ileana as Riya: She is a clever and smart doctor. She is the 2nd daughter of Virus. She was in