On the May 17 airing of JTBC's 'With You', cast member Kim Sook visited IOI's dorm!
After looking around the room shared by IOI's shortest member Choi Yoo Jung and tallest member Kim Do Yeon, Kim Sook said, "This room looks like a room belonging to insomniacs. How much sleep do you get a night?" The two IOI girls answered, "If we sleep a lot, 3-4 hours?"
Kim Sook then remarked, "High school students usually do that." She continued asking the girls whether there were nights spent without sleep, to which they replied, "Today, we plan to do that. We have to return to the shop at 2 AM."
About her height, Kim Do Yeon revealed, "I'm 172cm. I used to be shorter than Im Na Young untie, but I guess I haven't stopped growing yet," to which Choi Yoo Jung remarked, "I've stopped..."