In a past episode, it became a hot issue after Wooyoung's first love made an appearance on the show. On the March 2 airing, another contestant startled Wooyoung by claiming he's a childhood friend named Ki Hwan.

If true, the contestant is a talented singer and a childhood friend of the idol. If false, the contestant is a tone-deaf and the older brother of Wooyoung's childhood friend. 

SEE ALSO: Kim Woo Bin’s ‘date’ in Australia was actually a family trip, agency clarifies

Wooyoung had trouble recognizing the contestant but had a mental breakdown at the producers' ability to dig up his past. 

In the end, the contestant revealed to be tone-deaf, meaning he's not Wooyoung's friend. However, Wooyoung had another surprise as Ki Hwan actually made an appearance.

Watch the surprising reunion of Wooyoung and his friend in the clips!