What kdrama is this scene from?

There’s this scene that’s been stuck in my mind for a long time now where the male lead meets the female lead for the first time and for some reason holds his index finger out and the female lead touches his finger with her index finger and says “e…t?” While tilting her head

I don’t remember who the leads are or which kdrama is that, if someone can help me out with this I’ll be really grateful, 

Thanks in advance

When i think ET i thing of the E.T chingu bit  from  Run on. ML first met the SML that way.

ML did it with FL too but not as a  first meeting so thi sis probably not what you re looking for lol