Hyoyeon gave hints on her past boyfriend.

On the November 3rd episode of 'Invincible Youth', she talked about a boyfriend who would often say something while they were under the influence of alcohol and not remember any of it afterwards. She revealed, "He told me, "Are you suffering? I'll pay for your contract fee so you can do whatever you want from now on"."

She kept talking about her boyfriend, and accidentally blurted, "But he's doing worse than me-". When she realized she was giving too many hints about who her past boyfriend could be, she suddenly stopped and grinned, expressing frustration at herself for going too far.

She also confessed, "I trusted him because I liked him. I trust people too easily."