CIX enters a new chapter with ‘THUNDER FEVER,’ their first release as a four-member group.
CIX returns with ‘THUNDER FEVER,’ their first mini album as a four-member group following Bae Jin Young’s departure. Released on January 23, 2025, this album marks a new chapter for the group, blending emotional storytelling with their signature polished sound. Exploring themes of love, uncertainty, and self-discovery, ‘THUNDER FEVER’ channels the intensity of sudden storms and feverish emotions into five dynamic tracks.
Title Track Breakdown: "THUNDER"
The title track, “THUNDER,” is a high-energy electronic pop song that embodies the album’s overarching theme—love as a force of nature. The pulsating beat and powerful dance break elevate the track, while the lyrics liken the rush of emotions to a thunderstorm. CIX’s vocal and rap performances strike a balance between vulnerability and intensity, making this a standout addition to their discography. The dynamic production and electrifying chorus ensure it’s a song that leaves an impact, solidifying the group’s signature blend of rhythm and power.
Notable Tracks & Member Contributions
Beyond the title track, ‘THUNDER FEVER’ boasts a well-rounded tracklist that showcases the group's versatility:
“Bad Moves” kicks off the album with an infectious dance-pop groove, featuring dreamy synths and a bass-driven rhythm. The song captures the tension of knowing a relationship is doomed but being unable to resist its pull.
“Lovers or Enemies,” originally released on ‘0 to 1,’ makes its return, delivering a retro-infused confession that plays with the contrast between love and rivalry. The sophisticated instrumental and the members’ harmonies enhance its charm.
“My Name is shadow” is a poetic and emotionally rich track that explores self-sacrifice in love. The delicate piano intro and grand string arrangement add a fairytale-like depth to its storytelling.
“My Everlasting Sun” closes the album on an uplifting note, promising unwavering companionship and warmth. With a rock-infused beat and heartfelt lyrics, this track resonates with hopeful energy.
Overall Themes & Concept
‘THUNDER FEVER’ encapsulates the turbulence of emotions—mixing moments of passion, uncertainty, and devotion into a cohesive sonic experience. The album stays true to CIX’s refined musical identity while also pushing their boundaries, incorporating diverse influences ranging from electronic pop to retro dance and orchestral ballads. As their first comeback as a quartet, it also signifies resilience and growth, proving the group’s ability to adapt and thrive in a new era.

Final Thoughts
CIX’s ‘THUNDER FEVER’ is a compelling continuation of their musical journey. The album delivers a strong mix of emotionally charged lyrics, intricate production, and standout performances. While some tracks are reintroductions from previous releases, they fit seamlessly within the album’s theme, creating a well-rounded listening experience. This release not only reaffirms CIX’s artistry but also sets the stage for their future as a four-member group. With its balance of energy and introspection, ‘THUNDER FEVER’ is a must-listen for both long-time fans and new listeners alike.