According to Ko Ji Yong, Seungjae is currently in the stages of a "baby-puberty", often causing arguments! During dinner, Ko Ji Yong asked his son, "When Seungjae and dad stop fighting?" Seungjae answered, "Until I'm 31! I'm gonna fight with you even if I grow much much much taller." 

"But you don't fight with your mom. How come?", Ko Ji Yong retorted, and Seungjae said with a smirk, "Do you know why? Because I like mom too much." Ko Ji Yong continued to question his son with, "What about dad?" Seungjae coyly remarked, "I do like you. But, I dislike you a tiny bit. Just a teeny tiny bit!" 

But later, to make his dad feel better, Seungjae confessed, "Dad is my friend whom I love... I love you as much as the universe!" Check out the cute bickering between father and son above!