According to the news, F4’s casts and Goh Hye Sun have been losing weight and lack of sleeping.
The casts have been busied by shooting’s schedules due to their popularity.
Lee Min Ho ( Goo Jun Pyo ) lost 8 kilograms and Kim Hyun Joong ( Yoon Ji Hoo) lost 6 kilograms since the beginning of the drama production.
Moreover, Kim Hyun Joong is still in his term of healing after the car accident.
Goh Hye Sun also has just recovered not long ago from the car accident.
For more information, check here.
This must have been hard for them. They have to keep filming in order to catch up with the airing time.
I wish them all the best and take good health.
This drama is a blast.
thanks and credit to Eunice C @ Allkpop , KBS.co.kr