IU and Yoo In Na prove their close friendship by vacationing overseas together.

Some photos of IU and Yoo In Na spotted together on the streets in Rome, Italy were shared through online community boards and quickly attracted much attention.

Regarding this, IU's agency said,"The two left on their own for a trip without any staff. They wanted to do it like that, booking the flight and organizing everything themselves. We don't know exactly when they will return, they just said they would be fine and not to worry".