Whatcha Wearin'?
나의 PS 파트너 (original)
Yoon-Jung accidentally calls a stranger, instead of her boyfriend, and has phone sex with the unknown man. When Yoon-Jung's relationship with her boyfriend turns sour, Yoon-Jung meets Hyun-Seung, the stranger she had phone sex with.
Starring Kim Ah-joong, Ji Sung, Shin So-yul, Kang Kyung-joon, Kim Sung-oh, Moon Ji-yoon, Kim Bo-mi, Kim Bo Yeon, Ok Ji-young, Jung Su-young
Watch "Whatcha Wearin'?" on Pluto TV released in 2012. It's a romance and drama movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie, and is currently available to watch for free.