Yeah that's Barun portraying a character called Arnav. Arnav had many many layers and shades to him. The arrogance, the feigned anger were all a facade and under that was a man capable of a lot of love. and love he does. deeply. the same ASR also stated that "love can reduce anyone to anything." so yes this is Arnav and he's very much capable of doing this action. especially when nobody is watching him (as in the other characters) he did a lot of things secretly. smiled lovingly etc.
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