Members of the group Billlie, Moon Sua and Siyoon, are getting ready to showcase their talents at the 2025 KBO League game between the Kiwoom Heroes and Doosan Bears on April 23rd at 6:30 p.m. KST at Gocheok Sky Dome in Seoul. Moon Sua will be making her ceremonial hit debut, while Siyoon will be pitching for the first time. They will also perform during the cleaning time to bring energy and excitement to the stadium.

Both Moon Sua and Siyoon have been practicing diligently to support the Kiwoom Heroes as their "victory fairies." Moon Sua expressed her joy at the opportunity, hoping for the safety and success of all the players. Siyoon shared her excitement about throwing the first pitch and pledged her full support for the game.

This event follows the recent success of Billlie's first unit, Moon Sua and Siyoon, who gained popularity with their digital single "SNAP (feat. sokodomo)" with a unique "chrome noir" concept. The unit attracted fans worldwide with their innovative music and visuals, achieving impressive milestones in terms of global reach and views on various platforms.