I'm assuming you're referring to the 2013 Indian Tamil-language film "Raja Rani" directed by Atlee Kumar, and its availability on various platforms, including Filmyzilla.
To support the filmmakers and enjoy the best quality (HD/4K) with subtitles, you should use official streaming platforms. Depending on your region, is typically available on: Disney+ Hotstar
Files on these sites are frequently low-quality "cam" rips with poor audio and visual resolution, detracting from the cinematic experience. Where to Watch Legally
Searching for is understandable in an age of rising OTT subscription costs and fragmented streaming services. However, the cost of piracy is far greater than the price of a single ticket or a digital rental.
The movie beautifully depicts how the couple eventually lets go of their past trauma and learns to fall in love with each other.