Earlier this week, aespa member Giselle and former f(x) member/actress Krystal were seen hanging out with other acquaintances. 

In one SNS photo uploaded by an acquaintance, Giselle and Krystal posed for a mirror shot while sitting opposite each other, while the caption read, "This is the best we can do for a group shot today." 

In another cut, the acquaintance wrote, "Finally trying out the trending 'Dubai chocolate' thanks to our maknae. All the while we all totally read the brand as 'f(x)'." 

Many Korean netizens were intrigued by this curious friendship between two idols representing SM Entertainment's 2nd and 4th generation of girl groups. Some commented, 

"This is really a curious duo."

"Maybe they're friends because they're both overseas Koreans?"

"When you see things like this, you never really know which celebs are close with whom."

"They somehow look good together."

"Since they were/are both SM, I'm sure they have plenty of overlapping acquaintances."

"It's such a mystery how celebrities even get to know each other."

"Most celebrities only hang out with other celebrities."

"I can barely recognize them like that."

"I surprisingly like seeing these two."