IU's mentality has become demolished by Yoo In Na's public admittance of her relationship with actor Ji Hyun Woo.

Yoo In Na, who was caught having a date with Ji Hyun Woo at a park on June 18, personally announced her relationship on her radio show that same night.

A listener asked Yoo In Na what IU's reaction was to the news, and Yoo In Na replied, "Her mentality has been demolished. IU is like a mother to me and she talks about many things with me." 

Internet users commented, "She must feel like she has lost her sister rather than gaining a brother-in-law", "They really are best of friends" and "Is it weird to say that IU matches In Na better than Ji Hyun Woo?"