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Song Il Kook and the triplets visited a folk-village school, where they caught eyes in their scholar uniforms. During the etiquette lesson, the teacher acted as if he was their father to teach them filial piety, and called out, "Dae Han ah~," to which Dae Han answered, "Yes, father," like the reliable, oldest son that he is. But when the teacher called out the free-spirited Man Se's name, Man Se copied him and replied, "Man Se yah!", in a loud voice, bringing laughs. Viewers will also find out why Min Guk burst into tears on the upcoming episode!

Stay tuned for this episode this Sunday at 4:50 PM KST!