IU is truly the Nation's Little sister. On the 21st, a photo of IU was shared online causing quite a stir among netizens. On the photo, IU can be seen on the set of a filming and she can be seen helping a guy with tying his necktie.

However, the identity of the guy is a mystery. Netizens commented "I envy the guy that IU helped tie his necktie", "IU sure has the best manners", "IU is like an angel, such lucky staff", "She's so kind".

Source