Mann Vasanai () is a 1983 Indian Tamil-language romantic drama film directed by Bharathiraja. Starring debutants Pandiyan and Revathi, with Vinu Chakravarthy, Ganthimathi, and Y. Vijaya in supporting roles, the film was a blockbuster, and was remade in Telugu as Mangammagari Manavadu (1984). Plot Ochayi, a widow, lives in Karisalpatti village with her son Veerannan, a school dropout. Ochayi's daughter is married to Mookkaiya Thevar, whose daughter is Muthupechi. Malaichamy Thevar, the chief of the neighbouring village, is the patron of the village school, where children from both villages study. Mookkaiya Thevar has an extramarital affair with Hamsavalli and spends most of his time and money on her. Though Muthupechi secretly nurtures a desire to marry her maternal uncle Veerannan, he does not think along those lines as their families are not on talking terms due to a dispute over a field that was to be gifted as dowry to Mookkaiya at the time of his wedding. Though Mookkaiya has a grownup daughter, he pressures his wife to get the dowry owed to him from Ochayi. However, Ochayi does not yield to the pressure as she feels that Mookkaiya, the womaniser, would squander it on his other women. A new teacher joins the village and falls in love with Muthupechi. When Muthupechi attains puberty, Mookkaiya organises a ceremony but does not invite Ochayi and Veerannan, her suitor, to perform rituals as per tradition. Enraged, Veerannan creates a ruckus. The villagers support him and advise Mookkaiya to invite Ochayi and Veerannan. Mookkaiya relents. All rituals take place and Muthupechi feels happy for having drawn the attention of Veerannan. Veerannan, who had all the while ignored Muthupechi, now gets attracted to her and they start meeting each other secretly. Veerannan promises to marry Muthupechi. Hamsavalli's brother Muthukalai asks Mookkaiya why he was not invited to perform the rituals of a suitor at Muthupechi's function. Though Mookkaiya is having an illicit relationship with Hamsavalli, he looks down upon them and is irritated with Muthukalai's desire. During a jallikattu festival in the village, Veerannan fights with a bull belonging to Malaichamy and wins a gold chain as a prize. Upset with his bull being subdued by Veerannan, Malaichamy schemes to teach a lesson to Mookkaiya who constantly boasts about his bull. He manipulates Mookkaiya into announcing that the person who controls his bull will win Muthupechi as the prize. Muthukalai feeds Mookkaiya's bull medicinal