The narrative of "Chachi No.1" centers around a seemingly traditional joint family. At the heart of the story is the character of Chachi, a figure usually associated with care, affection, and familial warmth. However, in classic Ullu fashion, the series subverts this expectation.

as Harsh: Plays the visiting nephew whose infatuation triggers the series' central conflict.

Chachi No.1 (2023) is a Hindi-language erotic drama series on the Ullu App that follows a young man named Harsh who visits his village.