One Fine Day (Jung Yong-hwa song)

[1] The track is a breakup ballad where the narrator recalls his former girlfriend and recollects his memories of their relationship, which he describes as "fine days".

[1][7] Actress Kim Seo-jin plays Jung's love interest in the video, which was shot in the style of a Korean drama.

[8][9] Filming took place in various locations, including in Noksapyeong station at dawn, Gyeongnidan-gil Road at 8 am, in a shop in Itaewon, and the director's restaurant.

[7] Jung initiated promotions for "One Fine Day" on January 22 by performing the song on weekly music chart shows.

[26][27] On February 5, 2015, a short version music video of the Japanese-language rendition of the single entitled "Aru Suteki na Hi" (ある素敵な日, "One Fine Day") was unveiled.

[30] Writing for Billboard magazine, columnist Jeff Benjamin ranked "One Fine Day" number four on his list of the best solo debuts in the first half of 2015, calling it as "an awe-inducing ballad".

[3] In a critical review of the album, Jung Min-jae of online magazine IZM described the track as an "outdated" ballad which was "worn out by singers before him".