This is one of the show where there are not main leads, the story revolves around a few family, Few parents with their childrens, Keshu and Ketki seems to the main who are more focused and slowly each families from the show will be shown and their struggles. This is just a show where Parents are scared of the Future with their Childrens.
Nandini just plays a Important role in the show with Shantanu But mostly the show seem to be focused on keshu and Ketki, I wouldn't say they are the main lead but they each of the families will be shown soon as possible ...
Thanks,
Regards
Imran