Actor Ku Hye-sun appeared to be different after weight loss. mbc Radio Star' broadcasted on the 8th night was featured in 'Transformation Adventure' featured by Ku Hye-sun, Jung Yi-rang, Lee Eun-ji and Lee Kwang-ki. "Actually, I gained a lot of weight recently. I changed the front seat a little bit. I changed it from 5 to 4," Ku Hye-sun said on the same day, showing that she was concentrating on her studies, drawing Eye-catching attention. "In fact, when I was in my 20s, I ate a whole rice cooker a day. When I packed lunch at School, my mother filled the kimchi cask with rice. I thought I was not fat, but I actually gained up to 60 kilograms," he said. Kim Gu said, "I control the weight and I can see the old golden grass," he said, referring to the drama "Boys Over Flowers" and making Ku Hye-sun smile.