Aespa's Giselle and Ningning / Captured from the group's YouTube channel

Aespa members Giselle and Ningning have surprised fans by revealing that they got matching belly button piercings together, sharing the spontaneous story behind the friendship milestone.

The pair opened up about their new piercings in a video titled "[R(ae)cord] Chobaz's friendship piercing story," uploaded to Aespa's official YouTube channel on Tuesday.

"We got belly button piercings," Giselle said.

Ningning said the decision was completely unplanned.