They decide to move in together in a live-in relationship, renting a room in the charming apartment of an elderly couple, Ganapathy (Prakash Raj) and Bhavani (Leela Samson). While Adi and Tara enjoy their "no-strings-attached" arrangement, they slowly discover the depth of true companionship.

The story follows Adhi and Tara, a young couple who meet at a wedding and fall into a whirlwind romance. Both are career-driven and skeptical of the institution of marriage, leading them to enter a with a fixed "expiry date" before they move abroad for their respective careers.

The original version features the raw performances of the lead pair and Mani Ratnam’s specific directorial nuances that make the storytelling feel more grounded and poetic. Where to Watch O Kadhal Kanmani in Hindi?