Twinkle Twinkle (Korean: 반짝반짝 빛나는; RR: Banjjak Banjjak Bitnaneun) is a South Korean television series starring Kim Hyun-joo, Lee Yu-ri, Kim Suk-hoon and Kang Dong-ho.

[2] Twinkle, Twinkle is a light, cheerful, and heartwarming family drama that tells the success story of Han Jung-won (Kim Hyun-joo), a workaholic career woman who is determined to make her own way in the world without the help of her family, which has garnered considerable wealth from their publishing company.

But what Jung-won doesn't know is that because of the hospital's negligence, she was switched at birth with another baby, Hwang Geum-ran (Lee Yu-ri).

The identity swap resulted in the two girls being raised by families of different wealth and status, and living a different fate.

But even after being restored to her rich biological parents, Geum-ran's bitterness makes her consider Jung-won her rival, and she continues to torment her.