On July 12 airing of 'House Cook Master Baek 2', Gugudan's Kim Se Jung joined Lee Jong Hyuk and the rest of the cast as a guest. During the show, the actor surprised everyone as he revealed, "My middle school friend's daughter is an IOI member. What was her name.. Kim So Hye?" 

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Others on the show, surprised that Lee Jong Hyuk is older than they thought, asked, "You're the same age as So Hye's father?" Lee Jong Hyuk then quickly responded, "Well, he married when he was young."