During the showcase for FIESTAR's second mini album 'A Delicate Sense,' which took place at Seoul's MUV Hall on March 9, Cao Lu confessed to being "green with envy (literal translation from Korean would be 'my stomach hurts' from envy) when other groups did their showcases." 

Yezi, who was sitting next to Cao Lu, wisecracked, "Are you sure it wasn't just hunger pangs?" Cao Lu repeated, "It hurt." Well, now that you guys have finally made your much awaited comeback, we can only hope that Cao Lu's stomach won't be hurting any more from envy. 

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FIESTAR's leader Jei also relayed during the showcase, "Because this is our first showcase, all five of us are really nervous yet happy at the same time. Please look favorable upon us since this is the first time we are introducing our song."