SEE ALSO: Han Soo Ji sings the theme songs for 'Angel Eyes'

"Blue Bird" is composed and arranged by Kim Hee Jin and 'Angel Eyes' music director Nam Hye Seung, and is written by Jo Jung Hee herself. The tranquil song turns the sad scenes in the drama into beautifully touching moments, especially when portraying Goo Hye Sun and Lee Sang Yoon's connection that makes them inseparable even when the past comes to haunt them.

Let "Blue Bird" touch that soft spot in your hearts as you listen to it below!