One

Cha Se Rin, a decent girl who is a model, and the daughter of Cha Ship Company has been choosed to be the wife of an international group Exo's Sehun for a famous reality program.

Having to deal with the famous group's youngest member, along with both of their busy schedules and his massive fans, will she be able to do this?

Will she finally discover the true feelings between their fake marridge?