Girls' Generation Yoona revealed a story of a scary male fan.

In KBS "Happy Together 3" aired yesterday, Yoona talked about a male fan who followed them all the way into their dorm.

Yoona said, "It was 4AM and I was going to press the password for our front door, but the lights were on upstairs. I looked at the window through my peripheral vision and a person came down."

She continued, "So I barely got inside but I heard he got in a fight with the lady who works for our dorm. It was so scary. Since then, the manager walks us inside."

Photo Credit: KBS2