Kim Tae-hyun

Male celebs play make-believe as high schoolers, welcoming star transfer students every week and engaging in battles of witty humor and slapstick.

Haeundae Lovers is a 2012 South Korean television series about a prosecutor who goes undercover to infiltrate a crime family in Haeundae, Busan, then gets into an accident and loses his memory. Thinking he's a gangster, he falls in love with the mob boss's daughter.

Male and female contestants compete for "each other" in romance games. For example guests have to dance in order to impress the person they are after. Contestants are artists, actors, models, comedians, and MCs of the South Korean entertainment industry.

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.