Jessica and Krystal recently attended a launch of Jessica's fashion brand in NYC together.

Fans caught the sisters coming back to Korea and captured the cutest moment of sisterly-love!

As always, the two look chic and fashionable.

When they step outside, they're faced with cold, windy weather! Jessica has a scarf and looks okay, but Krystal looks cold, clutching her coat.

And then the cutest thing happens.

Jessica takes off her scarf...

...and gives it to her sister! She even wraps it around Krystal herself.

The sister duo walks on, as if nothing happened. Guess that kind of action is pretty day-to-day for these two!

Fans are loving this cute moment between the two idols, saying, "They look so good together." One wrote, "They say Jessica is cold-hearted, but she definitely is not." One netizen wrote, "I actually got closer to my sister after watching the show where these two are together. I feel like there's nothing like sister relationship." Another fan commented, "I want to be that scarf!"

What's your favorite thing about Jessica-Krystal interactions?