Aasai is a 1995 Indian Tamil-language romantic thriller film, written and directed by Vasanth and produced by Mani Ratnam. The film stars Ajith Kumar and debutant Suvaluxmi, with Prakash Raj, Rohini, Poornam Viswanathan, Nizhalgal Ravi, and Vadivelu in roles. It revolves around an army major lusting for his sister-in-law, and attempting to ruin her relationship with her lover.

Plot

Saraswathi "Yamuna", the younger daughter of an Orthodox father, comes to Madras for finishing her studies. Major Madhavan, the husband of Yamuna's elder sister Ganga, gets infatuated with Yamuna after seeing her photo in a letter sent by her. Meanwhile, Yamuna meets Jeevanantham "Jeeva" in a bus, who gives his ticket to her as she had not taken her own. Later one day, Jeeva decides to express his love to Yamuna by writing in a letter and giving it to her, but he witnesses a group beating a boy who did the same, so he disposes the letter. It is found by Yamuna, who realises his love.