Hansika revealed that she would play a girl with a 'futuristic attitude', while Jayam Ravi's character would be more conservative in the romantic comedy. A photo shoot was then held and promotional stills featuring the lead pair were released to the media in late March 2014. Subsequently, he chose to cast Hansika Motwani in a leading role instead. The director had initially finalised/convinced Nayantara to play the leading female role but did not want to repeat her pairing with Jayam Ravi, as the pair were working on another production, Raja's Thani Oruvan, at the time of casting. Despite its title, it is not based on the William Shakespeare play Romeo and Juliet. Lakshman, who had previously ventured into films as producer of Kalvanin Kadhali (2006), announced that he would make his first venture as a director with a film titled Romeo Juliet featuring Jayam Ravi in the lead role.

The story ends with Kartik and Aishwarya reunited. She professes her love but Kartik refuses and leaves the place with Nisha, but then a song plays, and Kartik reveals all of this is a play orchestrated by Nisha and him to make Aishwarya realise her mistake and her love for him. She goes to the place where Kartik and Nisha are going to get engaged. On the night Aishwarya is supposed to leave, she realises that she does not want to live this kind of robotic life with Arjun and tells him she loves Kartik.

At the same time, Arjun and Aishwarya plan to go to London. In a temple, Kartik tells her that his engagement with Nisha is going to happen the night before Valentine's Day. Aishwarya soon gets disturbed with the rich lifestyle given by Arjun. With Kartik standing in her way and threatening to break her relationship with Arjun, Aishwarya is forced to find a suitable girl for Kartik and finds Nisha ( Poonam Bajwa) for him.

Aishwarya ( Hansika) falls in love with Kartik ( Jayam Ravi) assuming he is rich, but once she realises he is just a gym instructor, she leaves him and wants to get together with a rich man Arjun ( Vamsi Krishna).

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