Maryada Ramanna (2010) on Netflix

Goodhearted but unlucky bicycle-deliveryman Ramu learns that he owns five acres in his parents' hometown in Rayalaseema, and sets out to sell the land. He befriends his fellow train passenger, the beautiful and charming artist Aparna, called Appu for short. Appu's family welcome him, before realizing he is a descendant of their sworn enemy from a violent long-standing family feud. The family's own strict rules of hospitality require them to treat Ramu well while he remains under their roof, but they plan to kill him the moment he steps over the threshold...