The idol group ONE PACT unveiled the highlight medley video for their debut EP '1'ONLY(One and Only)' at midnight on the 20th through their agency Armada ENT's official social media channels. The video, featuring key audio from four of the five tracks, immediately sparked enthusiastic responses from global fans and heightened anticipation for their comeback. The album opens powerfully with 'O-P', a boom-bap hip-hop track that vividly imprints ONE PACT's unique identity, followed by the title track 'SANE(Sane)', which conveys raw emotions and feelings without complex calculations. The sound, built around metallic synths that organically fuses hip-hop, pop, and rock elements, evokes both excitement and tension simultaneously. The EP continues with 'Pull Up', a digicore genre track that explores laid-back yet bold flirting toward someone of interest, and 'DO U FXXKING LOVE ME TOO', a pop-rap song delivering blunt confessions despite knowing the other person's feelings have cooled. These tracks of distinct colors connect organically, signaling the album's robust completeness. With a special track kept under wraps until release day included, the debut EP comprises five songs in total. ONE PACT's ambitiously crafted first EP '1'ONLY' is expected to satisfy fans' heightened expectations through its powerful musical identity and harmonious blend of diverse genres.