SECRET's Jieun made a surprise appearance as a cute stalker on 'Shut Up Family'.

She appeared on the October 19th episode where she acted as a high school girl who had a crush on Park Seo Joon. Park Seo Joon agreed to date her in order to make Dasom jealous, but as the days went on, Jieun's actions caused him to be more cautious and scared of her.

First, she started by telling him that she knew everything about him, including having knowledge of which volume he last read in a comic book and what product he failed to buy because it was sold out. Her actions got worse by the day and she waited in front of his house at 5AM to walk to school together, and even wrote a letter for him in her blood. She then demanded that he write her a similar letter in blood as well.

Check out the cuts of her in the episode below!