"First Winter" (Korean: 첫 겨울이니까; cheos gyeoul-inikka) is a duet recorded by South Korean singers Sung Si-kyung and IU. It was released as a digital single on December 9, 2019, by SK Jaewon Co. and Kakao M.
Background
On December 5, Sung Si-kyung’s agency stated, “Sung Si Kyung’s new digital single, which is set for release on December 9, will feature IU.” The digital single titled “First Winter”. Sung Si Kyung and IU worked together in 2010 on the song “It’s You,” making this their first collaboration in over nine years.
Track listing
Chart performance
The song debuted at number 3 on South Korea's Gaon Digital Chart for the chart issue dated December 8–14, 2019