On September 11, Jisook posted a photo on her Instagram page with the caption, "Oh Seung Ah unnie's birthday party." As you can see in the photos below, the party seems like a blast with potluck style food, beverages, and more.
Seeing this, netizens commented, "Rainbow friendship! Forever", "They look great together as always," "Happy Birthday!", etc.
Happy early birthday, Seung Ah!