The film starred Madhavan, Sadha, Vivek, Kanika, Rahman and Delhi Ganesh in pivotal roles, and had a musical score composed by Yuvan Shankar Raja.

[citation needed] Subramani aka Mani lives with his older sister and brother-in-law, who adopted him after his biological parents died.

Natarajan wants to get rid of the students, who used to stay at a hostel, but were expelled due to bad behaviour.

Mani receives money from Natarajan as payment and in turn, he gave to his cousin asking her to give it to her lover, so that he can get a job and that she can finally talk about him to her father.

Mani and Auto Sampath kidnap Priya on the day of her marriage from the wedding hall thinking her to be the lover of the non-bachelor student.

Mani apologises to Priya and requests to drop her back to her home, while having been to introduced to Natarajan and Gayatri as the sister of one of the students.

Slowly, Priya gets attracted towards Mani seeing his kind nature and also after coming to know about the sacrifice made by him for the well-being of his cousin, while also of his help to get an acceptance from the family of the married student's wife of their marriage.

Priya's father found out where his daughter is and attempted to take her back with him, but eventually ended up having a fight with Mani and was defeated by him.

This causes Raghavan to kill Dhanapathi and one of the students, while covering up the murders and getting another of his colleagues, a police constable to be an eyewitness of this by pinning it all on Mani.

Mani covers both murders by getting Priya to be an eyewitness to this crime, while also getting himself to be innocent by having the constable to reveal the entire truth to the press.

They along with Auto Sampath and the rest of the tenants depart the house, gave their farewells to Natarajan and Gayatri, and went on their own separate ways.

The film ends with a group of bachelors wanting to be the new tenants of the house by being just like the students pretended to be: good boys.

In late 2003, Damini Enterprises brought director K. S. Ravikumar and actor Madhavan together for a project titled Ethiri.

Sadha and Vivek were added to the cast, while Yuvan Shankar Raja was announced as the film's music composer.

Nikita Thukral initially began portraying the role of the second female lead actress in the film, but was replaced by Kanika midst production.

[12] K. N. Vijiyan of New Straits Times wrote "What saves the movie is Madhavan's acting and Vivek's outrageous comedy.