Priya needs a child so she intentionally shows her skin to Vichu, who responds. Naani somehow manages his mother by disappearing at night. (Hindu marriages usually take place at Night). Naani becomes Vichu and marries Priya that evening. Raj kidnaps him on the wedding day, but then Vichu becomes Naani. Naani's mother befriends Priya and Priya comes to like Naani. He sees Priya angrily waiting for Vichu at the theatre while going home with his mother. Priya asks him to accompany her to a matinee. The scientist tells Vichu to accept Priya. Priya expresses her love, but Vichu tells her to love a man suitable for her age. Naani lives as an eight-year-old boy during the day and as a twenty eight-year man (Vichu) at night. That night he changes back into the young man, shocking the scientist. The scientist complies and Naani reconciles with his mother. Naani asks the scientist to change him back. Naani meets his mother who had fallen ill. Naani meets his brother as an anonymous man and hears that his mother is depressed over Naani's disappearance. Naani overcomes Raj's idea for a new type of bed for kids and introduces his own idea. Their friendship makes Raj (another employee) jealous. Priya is happy to see Naani in her company. The company falls into the hands of the owner's daughter who turns out to be Priya. The owner who interviews him demands that he have childhood memories and be like a child to understand children's tastes. Naani goes for a job interview at a toy manufacturing company. The girl is attracted to him and looks for him. Naani helps remove dust from her eyes, smiles at her, and leaves. Naani meets a girl (Priya) at a park who helped him once when he fell down. The only person other than the scientist who knows the truth is his child friend. Naani starts to live as a young man physically, but remains a child mentally. Naani agrees and the scientist uses his research to transform him into a young man. He insists that Naani help him in his research. The old man introduces himself as a scientist who has his own laboratory. But he is stopped by an old man who takes Naani to his place. This hurts Naani and he runs away from home to jump into a river. Naani's mother scolds him and shouts at her husband for not stopping with one child. Angered, Naani cuts off the power which creates a short circuit at home. Naani's elder brother plans to watch a movie with his friends in the absence of their parents and Naani demands to join him, which his brother does not allow. Naani falls down on a road one day and a young woman helps him. His mother scolds him for his behavior, such as when he eats toothpaste or urinates in bed. Naani is a mischievous eight-year-old boy who is always troubling his mother.

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