Again, the title is phonetically similar to "Main Aur Tum."
It is highly likely you are confusing the title with one of the following popular movies from that era. Here is a review based on the most probable candidates: main aur tum 1987 hindi movie 111 link
The story follows a serial killer on the prowl who targets couples during their private moments. The killer leaves behind a cryptic clue: the number , a journalist, and his girlfriend main aur tum 1987 hindi movie 111 link
Main Aur Tum (1987) – Hindi Film Overview main aur tum 1987 hindi movie 111 link