Kim Mi-ryeo

Celebrity guests are split into two teams to compete in various contests. One guest, known only to himself, is designated the "X-Man", and does his best to cause his team to lose the contests. At the end, all guests try to determine the X-Man's identity.

Dating coach Bo-ra, whose relationship is failing, and prickly publisher Su-hyeok team up to save Bo-ra’s love life for the sake of her upcoming book about dating. The collaboration results in the mind game of romance.

A top star actress in deep crisis and a man who makes a fake reply to a fanletter start their romance story.

Ju-yeon and Seong-tae's decade-long best-friendship comes to a crashing halt one night after they sleep together. The shock of doing the deed subsides, reality sets in, and the two decide to get married.