Oru Kadhal Seiveer is about whether it is right if a girl has physical relations before her marriage.

Vasanth, a wealthy businessman, falls in love with Priya during his visit to Rajasthan. To woo Priya, he impersonates a man named Vasanth Kumar who had saved her life before.

This film is based on city based romance between the lead pair.

Police Pandi (Soori) the owner of a real estate agency, borrows 15 lakhs from Vatti Varadhan (John Vijay), a local rowdy and don to start his business. Murugan (Vikram Prabhu) is Pandi’s assistant, and he gives the media an advertisement in which he persuades people to buy land from ‘his’ company, making many people persuaded from it. A billionaire wants to buy all the land, and when he is about the to sign the papers, they find out the land is actually a graveyard, causing the billionaire to not buy the land. When they are in the bar drinking alcohol, a call comes on Pandi’s phone. Murugan answers it, thinking it was the broker who sold them the land, but it was actually Varadhan. Murugan talks to Varadhan in foul language, and when he ends the call, Pandi tells him it was actually Varadhan. He then goes to another table and asks a man for some wine. The whole group befriends the man, who is mute.

A story about a young Muslim man who struggles for his mother to reunite her with her Hindu brother. The story reveals the twist & turns.

Surendhar’s mother tells him that she has found him a bride. Before the couple can meet, his mother dies in an accident. He sets out to find the woman his mother wanted him to marry.

The plot revolves around two fathers and their sons. GK (Raghuvaran), Dev (Vikram) father, is a smuggler who lives in a house near by Thangiah S. P. Balasubrahmanyam, father of Guru (Ajith Kumar). In his childhood days, Guru got attracted by GK’s activities and follows his footsteps. While Thangiah tries to convince his son, it is all in vain. He got vexed and started to raise Dev (GK’s son), as a good man. In their college days, Dev becomes a singer. With the lover boy image, he is really popular among the ladies in the college. While Guru studying in the same college becomes a dancer and turns out to be a local dada, who helps GK in his business. Both Guru and Dev fall in love with the same girl Megha (Maheswari). Who is in love with Guru. Thangiah comes to know about Dev’s love for her and begs Guru to leave his love for Dev, since he won’t be able to lead a peaceful life in the shape he is. Despite Guru having thoughts of leaving Megha. Dev steps aside knowing that Megha in love with Guru. As Dev hides his feelings for Megha. He wishes the both of them by saying, that the love they have for each other will prevail. The film ends with Guru’s choosing to stay with the dark world and with Megha, by his side.

Raj Kumar (Mahesh Babu) goes on holiday in Khandala and stays with his uncle Dhananjay (Prakash Raj). He comes across Rani (Preity Zinta) and falls for her. However, he ends up teasing her and she begins to despise him. She is determined to avoid him, but he won’t leave her alone. Raj Kumar saves Rani from some thugs, and she is impressed by his heroism. After spending some time together, she begins to like him and eventually love him.
Unfortunately his uncle has made other plans for him: He reveals the past of the hero’s parents and his family. He mentions the challenge that he made with his in-laws to get the hero married to his daughter. Complying to this, the hero informs the heroine that their relationship needs to end there.
Going with his uncle to the village for his uncle’s daughter, to his joy he sees that it’s none other than Rani.

The underworld don Billa (Ajith Kumar), featured on Interpol’s criminal list, is hiding and operating out of Malaysia. DSP Jayaprakash (Prabhu) has spent the last few years looking for Billa, leaving behind a life in India.
During a chase with the police, Billa is severely wounded after an accident and dies in front of the DSP. The DSP then secretly holds a burial of Billa. Interpol officer Gokulnath (Rahman) is assigned to work with DSP Jayaprakash to capture elusive Billa as no-one knows of Billa’s death. DSP Jayaprakash keeps the death of Billa as a secret even from his fellow officers, and tracks down a look-alike called Saravana Velu (Ajith Kumar), a lowly pick-pocket. He asks Velu to infiltrate Billa’s gang by pretending to be Billa. In return he will make sure that the child Velu adopted, Karan, gets a proper education.

There is a group of friends and romance occurs between a tow. There are people who try to spoil it. Did the couple unite against all odds?

Sridhar (Tarun) is a final year degree student and gets selected in the campus selections for studies abroad. He goes to Mumbai for an interview and in his return finds Preeti (Trisha) and loses his heart to her. Sridhar comes to know that Preeti was about to join in degree and Preeti learns that he was a final year degree student. Sridhar is an ardent cricket fan, so is Preeti, while Sridhar is also a good football player. The principal of the college appoints a coach called Reshma (Shriya), who is also a student, for the football team led by Sridhar. Sridhar tries his best to trace Preeti by visiting several women’s colleges, while Preeti also watches for Sridhar at the men’s college. Accidentally, Preeti helps Sridhar’s mother, when she had a heart attack. In order to find Preeti at any cost, Sridhar goes to the LB Stadium, where a cricket match is in progress and gets injuries in a bomb blast in the stadium. Just before the blast, both Preeti and Sridhar find each other but could not meet due to the blast.

Sajan Joseph Alukka (Kunchako Boban) is a soft-spoken and studious young man, while his junior Priyamvada (Meera Jasmine) is smart and outgoing. Her close friend is in love with Sajan, but he avoids her by saying that his only ambition in life is to study hard and become an IAS. But Priya follows him and digs out the truth that though he hails from a rich family, his father has now gone bankrupt and has no money even to pay the exam fee. On hearing this, her friend ditches him. Slowly Priya starts having a soft corner for him. She even pays his fees, but Sajan tries to avoid her and treats this as an insult.