Seohyun talked about her past dating experience on 'A Hyung I Know'!
On the show, the members tried to get something out of her by asking, "Are you single right now?", to which Heechul answered instead and said, "I don't think she's ever been in a relationship." She cut in and said, "That's not true." The members asked more about her relationship, where she revealed that she cried when they broke up.
At the question, "Is he still active right now?" She asked back, "Active how?", they clarified, "Is he still active as a celebrity?" She gave a shocking answer and said, "He's retired from the industry right now."
Who do you think it could be?