Doublast is the second extended play by South Korean girl group Kep1er. The EP was released by WakeOne on June 20, 2022, and contains five tracks, including the lead single "Up!".
On June 3, Wake One Entertainment announced Kep1er would be releasing their second extended play titled Doublast on June 20.[2] Four days later, the promotional schedule was released.[3] On June 10, the track listing was released with "Up!" announced as the lead single.[4] Three days later, the highlight medley teaser video was released.[5] The music video teaser for lead single "Up!" was released on June 16 and 17.[6][7]
^Jang, Jun-hwan (July 2022). "Doublast". IZM. Retrieved October 17, 2023.
^Park, Seo-yeon (June 3, 2022). "케플러, 20일 컴백 확정..여름 공약 미니 2집 'Doublast' 발매(공식)" [Kep1er's comeback confirmed on the 20th..Summer promise 2nd mini album 'Doublast' released (official)] (in Korean). Herald Pop. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Kang, Da-yun (June 7, 2022). "케플러, 미니 2집 프로모션 스케줄 공개...상큼X청량 여름 무드" [Kep1er reveals promotional schedule for 2nd mini album...Refreshing X refreshing summer mood] (in Korean). My Daily. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Seon, Mi-kyung (June 10, 2022). "케플러, 'DOUBLAST' 트랙리스트 공개...타이틀 곡은 'Up!'" [Kep1er unveils 'DOUBLAST' tracklist...The title song is 'Up!'] (in Korean). Osen. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Kim, Ye-na (June 13, 2022). "'20일 컴백'케플러, 신보 하이라이트 메들리 영상 공개...악적 성장" ['Comeback on the 20th' Kep1er, new album highlight medley video released...musical growth] (in Korean). X-port News. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Hwang, Mi-hyun (June 16, 2022). "케플러, 신곡 MV 티저 공개...탄산음료 같은 청량 매력" [Kep1er unveils new song MV teaser...Refreshing charm like soda] (in Korean). News1. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Park, Seo-yeon (June 17, 2022). "케플러, 신곡 'Up!' 두 번째 MV 티저 공개..강력 중독성 예고" [Kep1er's new song 'Up!' Second MV teaser released..Strongly addictive notice] (in Korean). Herald Pop. Archived from the original on June 20, 2022. Retrieved June 19, 2022 – via Naver.
^Kang, Da-yoon (June 20, 2022). "케플러, 오늘(20일) 서머송 '업!'으로 컴백...상큼·청량 에너지" [Kepler, comeback with summer song 'Up!' today (20th)...Refreshing and refreshing energy] (in Korean). My Daily. Archived from the original on June 22, 2022. Retrieved June 22, 2022 – via Naver.