IU and HIGH4 have a close bonding inside a recording studio

IU and rookie boy group HIGH4's friendship is no doubt. A video of them inside a recording studio is released revealing their close relationship are friends and as hoobaes-senior.

IU takes care of her friends and hoobae well as she guides them while the boys are very attentive to her needs. They must be very comfortable working hands on with their duet single.

Watch below: