Kep1er was originally scheduled to debut on December 14, 2021, with their first EP First Impact, with pre-orders beginning on November 29.[1] However, it was announced that the group's scheduled debut had been delayed to January 3, 2022, due to one of their staff members having tested positive for COVID-19.[2][3] On December 14, it was revealed that group members Mashiro and Xiaoting tested positive for COVID-19.[4] On December 26, Kep1er's agency announced that Xiaoting and Mashiro have fully recovered from COVID-19.[5]
On January 3, 2022, the song was released together with its accompanying music video.[6]
"Wa Da Da" was written by BuildingOwner (PrismFilter), Elum (PrismFilter), and Shannon, Danke, Hwang Yu-bin, Odal Park, Lee Seu-ran, and Kako, composed by BuildingOwner (PrismFilter), Elum (PrismFilter), and Shannon, and arranged by BuildingOwner (PrismFilter).[7] Musically, the group is described as "dance song based on big room house genre" with lyrics about "Kep1er's bold aspiration to become the best and the promise to repay [their] fans who have supported and protected the nine girls' dreams".[8] "Wa Da Da" was composed in the key of B-flat major, with a tempo of 126 beats per minute.[9]
"Wa Da Da" debuted at position 130 on South Korea's Gaon Digital Chart in the chart issue dated January 9–15, 2022,[10] ascending to position 79 in the chart issue dated January 30 – February 5, 2022.[11] The song also debuted at position 21 on Gaon Download Chart in the chart issue dated January 2–8, 2022.[12] On the BillboardK-pop Hot 100, the song debuted at position 84 in the chart issue dated January 5, 2022,[13] ascending to position 71 in the following week.[14] In Japan, the song debuted at position 20 on the Billboard JapanJapan Hot 100 in the chart issue dated January 12, 2022,[15] ascending to position 9 in the chart issue dated January 26, 2022.[16] The song also debuted at position 21 on the Oricon Combined Singles in the chart issue dated January 17, 2022,[17] ascending to position 10 in the following week.[18]
In New Zealand, the song debuted at position 24 on RMNZ Hot Singles in the chart issue dated January 10, 2022.[19] In Singapore, the song debuted at position 11 on the RIAS Top Streaming Chart in the chart issue dated January 7–13, 2022.[20] The song also debuted at position 11 on the RIAS Top Regional Chart in the chart issue dated December 31, 2021 – January 6, 2022, ascending to position 3 in the chart issue dated January 7–13, 2022.[21][20] In Vietnam, the song debuted at position 73 on the Billboard VietnamVietnam Hot 100 in the chart issue dated January 20, 2022.[22]
In the United States, the song debuted at position 13 on the BillboardWorld Digital Song Sales in the chart issue dated January 15, 2022.[23] Globally, the song debuted at position 117 on the BillboardGlobal 200 in the chart issue dated January 22, 2022,[24] ascending to position 77 in the following week.[25] The song also debuted at position 171 on the BillboardGlobal Excl. U.S. in the chart issue dated January 15, 2022,[26] ascending to position 60 in the chart issue dated January 22, 2022.[27]
Prior to the extended play's release, on January 3, 2022, Kep1er held a debut showcase to introduce the extended play and its song including "Wa Da Da".[28] Following the release of the extended play, the group performed "Wa Da Da" on three music programs on the first week: KBS2's Music Bank on January 7, MBC's Show! Music Core on January 8, and SBS's Inkigayo on January 9.[29][30][31] On the second week of the song release, the group performed on Mnet's M Countdown on January 13, and KBS2's Music Bank on January 14, where they won first place in both appearances.[32][33] On the third week of the song release, the group performed on Mnet's M Countdown on January 20, where they won first place.[34]
^Choi Ji-yoon (December 5, 2021). "케플러, 데뷔 연기…스태프 코로나 확진 여파". NEWSIS via Naver (in Korean). Archived from the original on December 5, 2021. Retrieved December 5, 2021.
^Lee Jae-hoon (December 8, 2021). "케플러, 내년1월3일 데뷔…'2021 MAMA' 출연 취소" [Kep1er to debut on January 3 next year... Cancellation of '2021 MAMA' appearance]. NEWSIS via Naver (in Korean). Archived from the original on December 8, 2021. Retrieved December 8, 2021.
^"Kep1er 코로나19확진 관련 안내" [Kep1er information on COVID-19 confirmation]. Daum (in Korean). December 14, 2021. Archived from the original on December 14, 2021. Retrieved December 14, 2021.
^Kim, Won-kyum (November 26, 2021). "케플러, 샤오팅‧마시로 코로나19완치→1월3일 데뷔 프로모션 재개[공식]" [Kep1er, Xiaoting and Mashiro recover from Corona 19 → Debut promotion resumes on January 3 [Official]]. Spotv News (in Korean). Archived from the original on December 26, 2021. Retrieved November 26, 2021.
^Lee, Seul (January 3, 2022). "'걸스플래닛' 케플러, 오늘(3일) 가요계 출격...'퍼스트 임팩트' 발매" ['Girls Planet' Kepler, today (3rd) the music industry...Release of 'First Impact'] (in Korean). X-port News. Archived from the original on January 3, 2022. Retrieved January 13, 2022 – via Naver.
^ ab"First Impact" (in Korean). Genie Music; Stone Music Entertainment. Wake One Entertainment; Swing Entertainment. January 3, 2022. Archived from the original on January 8, 2022. Retrieved January 8, 2022 – via Melon.
^Lee, Seul (January 3, 2022). "'걸스플래닛' 케플러, 오늘(3일) 가요계 출격…'퍼스트 임팩트' 발매" ['Girls Planet' Kep1er, today (3rd) the music industry...Release of 'First Impact'] (in Korean). X-port News. Archived from the original on January 3, 2022. Retrieved January 8, 2022 – via Naver.
^"2022년03주차 Digital Chart" [Week 3 of 2022 Digital Chart] (in Korean). Korea Music Content Association. January 9–15, 2022. Archived from the original on January 20, 2022. Retrieved January 20, 2022 – via Gaon Chart.
^"2022년06주차 Digital Chart" [Week 6 of 2022 Digital Chart] (in Korean). Korea Music Content Association. January 30 – February 5, 2022. Archived from the original on February 10, 2022. Retrieved February 10, 2022 – via Gaon Chart.
^"2022년02주차 Download Chart" [Week 2 of 2022 Download Chart] (in Korean). Korea Music Content Association. January 2–8, 2022. Archived from the original on January 13, 2022. Retrieved January 13, 2022 – via Gaon Chart.
^"オリコン 週間 合算シングルランキング – 2022年01月17日付" [Oricon Weekly Total Single Ranking – Published on January 17, 2022]. Oricon (in Japanese). January 3–9, 2022. Archived from the original on January 19, 2022. Retrieved January 15, 2022.
^ ab"オリコン 週間 合算シングルランキング – 2022年01月24日付" [Oricon Weekly Total Single Ranking – Published on January 24, 2022]. Oricon (in Japanese). January 10–16, 2022. Archived from the original on January 21, 2022. Retrieved January 26, 2022.
^ ab"Hot 40 Singles". Recorded Music NZ. January 10, 2022. Archived from the original on January 8, 2022. Retrieved January 8, 2022.
^Jo, Hye-jin (January 3, 2022). "케플러, '재데뷔' 최유진→첫 데뷔 멤버들의 같은 '꿈' [종합]" [Kep1er, 'Re-debut' Choi Yoo-jin → The same 'dream' of the first debut members [Comprehensive]] (in Korean). X-port News. Archived from the original on January 8, 2022. Retrieved January 8, 2022 – via Naver.
^Lee, Seung-hoon (January 7, 2022). "'뮤뱅' NCT U, 'Universe'로1위..쪼꼬미⋅원위 컴백→하이키⋅케플러 데뷔[종합]" ['Mubang' NCT U, 1st place with 'Universe'..Chocome・Onew comeback→Highkey・Kep1er debut [comprehensive]] (in Korean). Osen. Archived from the original on January 7, 2022. Retrieved January 8, 2022 – via Naver.
^Lee, Ha-na (January 8, 2022). "'음중' 아이브, 새해 첫1위 "다이브 고마워"..쪼꼬미 컴백·케플러 데뷔(종합)" ['Umjung' Ive, first place in the new year "Thank you for the dive"... Chocome comeback, Kep1er debut (comprehensive)] (in Korean). Newsen. Archived from the original on January 8, 2022. Retrieved January 8, 2022 – via Naver.
^Ji, Min-kyung (January 9, 2022). "'인기가요' 아이브, 1위 인기 질주..에스파·쪼꼬미·김완선 컴백 [종합]" ['Inkigayo' Ive, 1st place popularity run..Aespa, Chocome, Kim Wan-sun comeback [General]] (in Korean). Osen. Archived from the original on January 9, 2022. Retrieved January 13, 2022 – via Naver.
^ abKim, Bo-ra (January 13, 2022). "'엠카' 케플러, 아이브 제치고1위…민호·효린 컴백[종합]" ['Mcar' Kepler overtakes Ive for 1st place...Minho and Hyorin comeback [Overall]] (in Korean). Osen. Archived from the original on January 13, 2022. Retrieved January 13, 2022 – via Naver.
^ abLee, Seul-gi (January 14, 2022). "'뮤직뱅크' 괴물신인 케플러, 아이유 꺾고1위『팬들 덕분』[종합]" ['Music Bank' monster rookie Kepler beats IU to win 1st place "thanks to the fans" [General]] (in Korean). My Daily. Archived from the original on January 14, 2022. Retrieved January 14, 2022 – via Naver.
^ abKim, Soo-jung (January 20, 2022). "'엠카' 케플러, 엔하이픈 꺾고 영광의1위..."영원히 함께해요" [종합]" ['Mcar' Kep1er beats the Enhypen to win 1st place..."Let's be together forever" [General]] (in Korean). X-port News. Archived from the original on January 20, 2022. Retrieved January 20, 2022 – via Naver.
^"2022년07주차 Digital Chart" [Week 7 of 2022 Digital Chart] (in Korean). Korea Music Content Association. February 6–12, 2022. Archived from the original on February 17, 2022. Retrieved February 17, 2022 – via Gaon Chart.
^"Billboard K-pop 100". Billboard Korea (in Korean). February 19, 2022. Archived from the original on February 15, 2022. Retrieved February 15, 2022.
^Jeong, Hye-won (February 18, 2023). "아이브·케플러·태연, 음원 부문 올해의 가수상 수상(12·1·2월)[써클차트어워즈2022]" [Ive·Kep1er·Taeyeon, Artist of the Year Award (December·January·February) [Circle Chart Awards 2022]] (in Korean). SpoTV News. Archived from the original on February 18, 2023. Retrieved February 18, 2023 – via Naver.
