Child actress Kim Yoo Jung sang Lyn's drama OST from the drama she appeared in.

She posted on her Twitter on Saturday, ‘I ran into Kim Yoo Jung from 'The Moon and the Sun'+_+ she quietly came up next to me and sang the 'Back in Time' song from the drama. She was so cute I gave her the Teddy Bear CD<3,’ with two photos.

The two had ran into each other at Shinhwa's 'The Return' concert.

In the photo Kim Yoo Jung and Lyn are smiling brightly while showing off their clear skins.

Internet users who saw the photos commented ‘Both pretty,’ ‘So cute,’ ‘The stars of 'The Moon and the Sun.’’

Photo: Twitter