Unpredictable Family - Season 1 Episode 104
Overview: Sun Woo wakes up at Eun Sung's place after a wild night of drinking. He ends up joining Eun Sung's family for breakfast, where he casually mentions being a year younger than Eun Hyuk, and Dong Gu finds this a bit awkward. Meanwhile, Min Guk calls Do Chul to discuss something about Hye Yoon's mother.