Darkness was truly emotional..you had written arnav with a great precision and beauty...sunshine was absolutely a pleasure to read..the way he ran and hug khushi making her do pinky promise was cute...Passage too was sweet..a bond between two friends...cool!
Despite your many many notes, or rather warnings... I want more and soon! :P
I've always wondered what it would be like if Khushi had been with him through his struggles. There wouldn't have been the initial hatred and pushing away.
I'm so enticed by the way you've written these first three OSes and I think it is exactly how it would have been if Khushi had always been there seeing as Khushi is Khushi and Arnav is Arnav.
Their ten-year-old forms were so aptly portrayed in my mind. A baby Arnav. I just wanted to hug him as tight as I could... But he has Khushi for that :)
I really hope you continue... This has so much potential and more that only you can take it to. :)