BLACKPINK's JiSoo And Red Velvet's SeulGi: What is the relationship between them ?

BLACKPINK's JiSoo And Red Velvet's SeulGi: What is the relationship between them ?
BLACKPINK's JiSoo And Red Velvet's SeulGi Show Off Their Adorable Friendship On Instagram
Let's take a look!

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Seeing how the two female idols were interacting with each other, many could not help but notice the close relationship which they had