Against the World is the first Japanese extended play and seventh overall by South Korean girl group Kep1er. It was released by WakeOne and Ariola Japan on April 30, 2025, and contains five tracks including the title track "Yum".
On January 6, 2025, WakeOne announced Kep1er's then untitled first Japanese EP, which will be released on April 30.[1][2] On January 15, it was announced that the EP will contain five tracks, including two original Japanese tracks, and the Japanese version of "Shooting Star" and "Problem" from their first Korean studio album Kep1going On, and "Tipi-tap" from their sixth EP of the same name.[3] Pre-order for the EP began on the same day.[4] The name of the EP, Against the World, was unveiled on February 3.[5] On February 17, the names of the two original Japanese songs, "Yum" and "Hell or Heaven", were revealed, with "Yum" serving as the title track.[6] "Yum" was released on April 9.[7]
^Kep1er、約1年ぶり日本作品発売決定「今までとはまた違った魅力を」 オフラインイベントも開催 [Kep1er to release first Japanese work in about a year "A different charm from before" Offline event also held] (in Japanese). Oricon. January 6, 2025. Archived from the original on January 15, 2025. Retrieved January 15, 2025.
^Kep1er、約1年ぶりとなる日本オリジナル作品のリリース決定 [Kep1er to release first original Japanese work in about a year]. Billboard Japan (in Japanese). January 6, 2025. Archived from the original on January 15, 2025. Retrieved January 15, 2025.
^4月30日(水)発売のKep1er Japan 1st EP <タイトル未定> 商品概要&店舗別特典を公開! [Kep1er Japan 1st EP <title undecided> to be released on Wednesday, April 30th. Product details and store-specific benefits have been revealed!]. Kep1er Japan Official. January 15, 2025. Archived from the original on January 15, 2025. Retrieved January 15, 2025.
^Kep1er、ユーモア溢れる「Yum」MVで華麗なパフォーマンス [Kep1er delivers a brilliant performance in the humorous "Yum" music video]. Billboard Japan (in Japanese). April 9, 2025. Archived from the original on April 9, 2025. Retrieved April 19, 2025.
