"Blue Valentine" is a song recorded by South Korean girl group Nmixx for their debut studio album of the same name. It was released as the album's lead single by JYP Entertainment and Republic Records on October 13, 2025.
On September 15, 2025, it was announced that Nmixx would be releasing their first studio album titled Blue Valentine on October 13.[2] On September 24, upon the reveal of the album tracklist, "Blue Valentine" was confirmed to be the album's lead single.[3] Previews of the song were released through the a cappella and original highlight medley videos on October 8 and 10 respectively.[4][5] On October 12, the music video teaser for the song was released .[6] The song was released alongside its music video on October 13, upon the release of the studio album.[7] The Mixx version was released on October 17, which includes the English and a capella versions of the song.[8]
Composition
"Blue Valentine" was written by J14 (Full8loom), Youra (Full8loom), Danke, Kook Ji-won (Jamfactory), Moon Seol-li, Jellybean (153/Joombas), Milena, and Seora, and composed by Kass, Sevn Dayz, and Stalking Gia.[3] The song is described as "a blend of melancholy synth sounds, guitar riffs and boom bap rhythms at different speeds", showcasing the group's signature, trendy take on the "Mixxpop" genre that fuses more than two musical styles into a single track.[9] It has also been described as a pop rock song.[10]
Promotion
Nmixx performed "Blue Valentine" on four music programs in the first week of promotion: Mnet's M Countdown on October 16, KBS's Music Bank on October 17, MBC's Show! Music Core on October 18, and SBS's Inkigayo on October 19.[11] In the second week of promotion, they performed on five music programs: MBC M's Show Champion on October 22, M Countdown on October 23, Music Bank on October 24, Show! Music Core on October 25, and Inkigayo on October 26, where they won first place in all appearances.[12]
↑ Shin, Dong-gyu (October 22, 2025). "Blue Valentine". IZM. Archived from the original on October 24, 2025. Retrieved October 24, 2025.
↑ Lee, Jae-hoon (September 15, 2025). 엔믹스, 데뷔 3년8개월 만에 첫 정규...'블루 밸런타인'[Nmixx to release first full-length album "Blue Valentine" three years and eight months after debut] (in Korean). Newsis. Archived from the original on September 15, 2025. Retrieved September 15, 2025– via Naver.
1 2 An, Tae-hyun (September 24, 2025). 엔믹스, 정규 1집 트랙리스트 공개...타이틀곡은 '블루 밸런타인'[Nmixx reveals tracklist for first full-length album... Title track is "Blue Valentine"] (in Korean). News1. Archived from the original on September 24, 2025. Retrieved September 24, 2025– via Naver.
↑ Kim, Min-ji (October 8, 2025). "실력으로 중무장" 엔믹스, 첫 정규 앨범 하이라이트 아카펠라 메들리로 공개["Armed with talent", Nmixx unveils a cappella highlight medley from their first full-length album] (in Korean). Herald Pop. Archived from the original on October 8, 2025. Retrieved October 8, 2025– via Naver.
↑ Son, Bong-seok (October 10, 2025). Nmixx, 정규 1집 아카펠라 하이라이트 메들리 이어 '전곡 음원' 일부 오픈![Nmixx, following the a cappella highlight medley of their first full-length album, partially opens the 'full track sound source'!] (in Korean). Sports Kyunghyang. Archived from the original on October 11, 2025. Retrieved October 11, 2025– via Naver.
↑ Lee, Seul-bi (October 12, 2025). 엔믹스 "멜랑콜리한 '블루 밸런타인' 반응 궁금...♥받고파" (일문일답)[Nmixx: "Curious about the reaction to the melancholic 'Blue Valentine'... We want to receive ♥" (Q&A)] (in Korean). Sports Donga. Archived from the original on October 12, 2025. Retrieved October 12, 2025– via Naver.
↑ Lee, Jae-hoon (October 13, 2025). 엔믹스, 오늘 첫 정규 '블루 밸런타인' 발매..."도대체 어디까지 성장할 것인가"[Nmixx releases their first full-length album "Blue Valentine" today... "How far will they grow?"] (in Korean). Newsis. Archived from the original on October 13, 2025. Retrieved October 13, 2025– via Naver.
↑ Park, Se-yeon (October 12, 2025). '컴백 D-1' 엔믹스 "첫 정규 컴백, 자신감 있게 준비...성장 느껴 기뻐" [일문일답]['Comeback D-1' Nmixx "confidently preparing for first full-length comeback... Happy to feel the growth" [Q&A]] (in Korean). Ilgan Sports. Archived from the original on October 17, 2025. Retrieved October 17, 2025– via Naver.
↑ Cho, Seong-woon (October 27, 2025). 엔믹스, 음원·음반 1위 X 음방 5관왕→첫 월드투어로 훨훨[Nmixx, No. 1 on music charts and albums X 5-time winner on music shows → Soaring with first world tour] (in Korean). Sports Donga. Archived from the original on October 27, 2025. Retrieved October 27, 2025– via Naver.
↑ "Blue Valentine" (in Korean). Dreamus. JYP Entertainment. October 13, 2025. Archived from the original on October 17, 2025. Retrieved October 17, 2025– via Melon.
↑ Lee, Nam-hee (October 24, 2025). [뮤직뱅크] NMIXX (엔믹스), 실력+인기 입증... 'Blue Valentine' 1위[[Music Bank] Nmixx proves their talent and popularity... "Blue Valentine" takes first place] (in Korean). KBS Media. Archived from the original on October 24, 2025. Retrieved October 24, 2025– via Naver.
↑ Jeong, Ye-won (October 25, 2025). 엔믹스, '쇼! 음악중심' 첫 1위 "엔써와 영원하고파" [TV캡처][Nmix, 'Show! Music Core's first No. 1 place "Encore and Eternity" [TV capture]]. Sports Today (in Korean). Archived from the original on October 25, 2025. Retrieved October 25, 2025– via Naver.
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