On the January 30 broadcast of Lunar New Year special variety 'Clench Your Fist and Boat Horn', the cast members learned a surprising fact about BTOB's Sungjae and Rose Motel's Yook Joong Hwan!

SEE ALSO: BTOB's Sungjae drops teaser trailer for 'EXHIBITION: Look Closely'

The show took on the concept of the cast members experiencing and documenting modern day fisherman's lives. During introductions, host Kim Byung Man pointed out that Sungjae, whose popularity recently soared after his appearance on 'Goblin', is a well-known fishing-dol. That's when Rose Motel's Yook Joong Hwan proudly stated, "He's my nephew."�

The cast members, surprised, asked, "Really?" and "Because you're the same Yook-sshi?", and Yook Joong Hwan stated, "He's in the same lineage as my father."�

Sungjae further nodded along with, "I'm supposed to call him Ahjae (in Korean, it can also mean a distant uncle)."�

Kim Jong Min then remarked, "Your faces are that different?"