What Name Shall I Give This Love?

Khushi is in love with Arnav (1x105)

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Arnav is mesmerised when he sees Khushi in a saree. Khushi realises that she is in love with Arnav. She imagines herself and Arnav as a couple. Shyam tries to cheer her up by getting sweets and decorating the house. What makes Khushi realise her love for Arnav?