KBS Mid-Autumn Festival drama Kiko, Go to Seoul! Minako, Li Hongji-Reiko Takashima tells the story of Keiko, a 40-year-old Japanese housewife, who was suddenly told that she had lung cancer and came to South Korea to participate in the selection of her daughter. Li Hongji plays a singer who is very persistent in music, but she is always eliminated in the selection. He has been growing since he saw Kiko who asked him to teach singing.

Only this episode. It's a Mid-Autumn Festival special, not a series.