Who Are You? ♡Dubchaeng♡

Dahyun was living in a dorm while she was a trainee at JYP Entertainment.One night,she dreamt about her playing the piano at a blank space but then a girl came and asked Dahyun's name.Dahyun told her name to the girl then the girl introduced herself and she was Dahyun's neighbour since she lived in the other dorm next to Dahyun's.