The drama is produced by SM C&C, the creators of "To the Beautiful You" and other dramas.
The idols will work in new jobs every episode, experiencing life as a normal person.
Girl's Day's Hyeri and WINNER's Song Min Ho will appear on the 294th episode of 'Running Man.'
Hyeri was recently admitted to the hospital and diagnosed with meningitis.
The two stars each came down with medical troubles following hectic promotional schedules.
The 'Reply 1988' star's schedule for the day was completely canceled following the emergency hospital visit.
Girl's Day previously had a comeback in July 2015, nearly eight months ago.
All eyes are on Hyeri as she considers her next project following the massive success of 'Reply 1988.'
The ranking also included 'Reply 1988' star Hyeri, Big Bang leader G-Dragon, Kim Soo Hyun and Super Junior's Siwon.
The singer-actress mentioned that she would be working on music projects with the group for the next few months.
Girl's Day member Hyeri starred in "Bare and Chic Fashionista" for the March issue of InStyle. The idol helped the magazine celebrate its 13th birthday with a photoshoot that followed a natural makeup and casual wardrobe theme.
The idol actress had multiple reasons for choosing the specific charity she did.
Hyeri also answered which of the four would not be a suitable candidate for marriage.