"Fate can't be ignored." "You can ignore everything if you try hard enough." When Doyoung and Donghyuck go missing, Taeyong and Mark go on a magical quest to find them.

They live in the seemingly same world with the seemingly same lives in the royal families, but since their early childhood, there was a piece of paper signed by their parents, which was going to be the reason for them crossing paths and not being able to change it. For people, living in royal families seems like a dream, but for them, it is only a game in which they are puppets, that are only trying to be themselves and failing. Doyoung is a crown prince who is supposed to marry Taeyong - a prince he never loved or cared about -, but there seems to be no person who would care about that.