Based on a Japanese manga, Kanna-San, Daiseikou Desu, this story revolves around Kang Han-na, an overweight phone sex employee and secret vocalist for Ammy, a famous Korean pop singer who actually lip syncs as she cannot sing. After getting humilitated … Ju Jin-mo, Kim A-joong, Sung Dong-il, Kim Hyun-sook, Im Hyun-sik, Lee Han-wi, Ji Seo-Yun Added on Amazon Prime 2023-02-05. Youtube Trailer