In Japan , it first aired in December 2010 on Korean cable channel Mnet Japan , followed by reruns in May 2011 on Fuji TV 's Hallyuα channel and Japanese cable channel DATV . Kim Hyun-joong and Jung So-min held a promotional event on May 3 , 2011 which was attended by 6,000 fans ; part of the proceeds were donated to victims of the March 11 earthquake
March 11 earthquake
2011 Tōhoku earthquake and tsunami
Playful Kiss