Kim So Eun and Kang Ha Neul gave an extra treat for both viewers who already watched the movie and those who haven't yet in the form of BTS cuts!

SEE ALSO: Kim So Eun and Kang Ha Neul reveal their first impressions of each other on 'Entertainment Relay'

One can tell that Kim So Eun and Kang Ha Neul are good friends and co-stars by how comfortable they are with each other during their moments of skinship. The two smiled and took care of each other with Kim So Eun looking like she's trimming Kang Ha Neul's nails on set.

They also made a promise that if over 2 million people watch 'Girl Ghost Story' they will wear ghost costumes and hold a free hug and signing session at Myeongdong, Seoul, so let's hope they reach their goal!