Yippee, I just cracked the promo

Yes, as per Monday episode both Manik and Nandini are playing the instruments. According to promo amms came and thanked to Manik to bring music back in Nandini life. At that promo scenario of room and in episode room is same. It means amms has come and seen manan to play music. Then she has become happy. But second part of promo is misleading. Manik is hiding himself near a cupboard. That room is completely different. It means Manik went there to meet Nandini but both saw amms coming and Manik hid himself behind the cupboard. It means amms will not able to see manan so soon. Actually this is my prediction regarding promo and upcoming episode.

its ams room i think as in promo nandani says something like that.

Ya its Amms room. weakened promo nandu says to manik we r in amms room and discussing about love some think like that,so its aams room.

I am agree with your analysis of promo