What's the name of a fat man counterattack movie in Korea?

According to the query of Douban movie official website, there is a fat man counterattack movie called "Ugly Woman Turn Over" in South Korea. This film tells the story of a chubby and lovely girl named Hannah, whose job is to sing body double for the popular singer Yamei behind the scenes. Hannah, who is not outstanding in appearance, has always had a crush on Han Xiangjun, a handsome producer in the company. Her girlfriend and fortune-teller advised Hannah to give up, but Hannah felt hopeful and tried her best to show kindness to win the favor of Xiang Jun.