On August 22 episode of KBS' television show 'The Return of Superman', Cha Eun-woo and his fellow group member MJ made a visit to Park Joo-ho's new home.
Na-eun especially showed some noticeable change of behavior in front of Cha Eun-woo that even Park Joo-ho was surprised about it.
Na-eun could not look at Cha Eun-woo in the eye, and she became very quiet and shy.
As Park Joo-ho noticed this, he asked Na-eun, "Are you feeling shy, Na-eun? Why are you so shy today?"
In response to his question, Na-eun just nodded with a shy smile instead of saying anything.
After hearing this, Na-eun blushed and continued to avoid eye contact with Cha Eun-woo.
Later on, Na-eun draw a picture and wrote, "I love you, Cha Eun-woo."