The group also released the digital album in four different languages – Korean, English, Chinese, and Japanese - so fans around the world can experience the album as they intended. Each member also got their own digital version that includes the English version of the title song ‘Knife’ and a remix of the song that was created by each of the members which was paired with a voice note from each member explaining why they have chosen to remix the song in that way, adding a level of individuality to the songs that fans can connect with. Together with the visual teaser videos, narratives, promotions, and the songs themselves create a unique story and listening experience that all fans can enjoy and understand Enhypen and their vampire lore.

“Knife” is an edgy, sharp track that highlights the danger of the situation in their story. The track does not follow the usual theme of love and romance seen in their songs but instead focuses on the danger that love has caused. Lyrics like “Clyde and Bonnie making love” keep romance as a continuing threat throughout their songs, while also highlighting the danger, as Bonnie and Clyde, in real life, were a criminal duo united by love, similar to the story Enhypen has created. The song, paired with the music video, gives it a cinematic feel, with the lyrics telling a story mirrored in the high-production music video. This contrasts with the opening song, “No Way Back”, which is an R&B track that is slower and softer, with attractive rhythms, and has a more slow-burning emotional feel, highlighting the other emotions that the Vampires are feeling and deepening the characters they have created.

“Big Girls Don’t Cry” is the second song that Enhypen chose to promote. The song features a catchy hook, a pop feel, and groovy choreography that makes it memorable. The song is short but fits perfectly into the album's narrative as the lyrics are about protecting their lover, linking into the story that the album creates.

The Sin: Vanish reveals a more protective emotional side to the Vampires in the story, compared to their last comeback, which focused on the unwavering desire that led to the incident referenced in this album's narrative. The overall vibe of this album is also edgier and darker, as seen in the “Knife” music video.

This album marks their sixth million-selling album and is on track to hit 2 million within the first week, with 1.6 million sales on the first day alone. The group's success continues to grow and is set to have another good year in 2026.