Billlie has heightened anticipation for their first fan concert by releasing a spoiler video. 

The group  posted individual posters for their first fan concert, "Billlie The 1st Fan-Con 'Your B, I'm B (Belllie've You)".

In the photos, Billlie flaunted pure visuals in white-toned outfits that accentuated each member's individuality. They enhanced their elegant charm by using props like flowers and confetti, and exhibiting a variety of expressions and poses.

Set to take place on May 4 in South Korea, the fan concert will last approximately 120 minutes and will include a range of segments to interact with fans. In addition to performing their well-loved title songs, the concert will also feature special stages exclusive to the event, raising fans' expectations with all seven members participating.

This fan concert serves as a message to Billlie's official fandom, Billlieve. Reflecting their gratitude through pre-debut fan song releases and continuous releases of five fan songs, Billlie is inviting fans to be part of their ongoing story, promising a special time.

Billlie's first fan concert will be held on May 4 at 4 PM KST at Myunghwa Live Hall in Yeongdeungpo District, Seoul. Tickets will be available via Interpark starting from 7 PM KST on April 17.