"Empathy" (교감; "Gyogam") is a pair of collaboration singles between South Korean musicians Jung Yong-hwa of CNBLUE and Sunwoo Jung-a.

After the two independently wrote incomplete lyrics to separate songs with each other in mind, Jung reached out to Sunwoo for a collaboration.

The songs received generally favorable reviews from music critics, who commended the vocal performance by Jung and Sunwoo.

Jung revealed his desire to work with Sunwoo shortly after releasing of his first solo album One Fine Day (2015).

[2] Also conveying the sentiment of wanting to participate in a song with Jung, Sunwoo wrote incomplete lyrics for "Fireworks".

Lee expressed his desire for the song's peak to have a "less obscure flow", but settled that "it's definitely a melody that readily clings to your ears".

[15] Rating the songs three out of five stars, Kim Ban-ya of online magazine IZM felt that "Hello" did not "dramatically deviate" from a "typical" ballad, but commended Jung's "masterful and captivating" vocals in "Fireworks".

[16] Han Dong-yun of online music store Melon felt that Sunwoo's "wistful tone" and Jung's "lucid and straight" singing in "Fireworks" allowed them to "gently harmonize", which contributed to "appropriate levels of moisture and warmth to the song".