Jeonghan and Seungcheol grew up together, in a village where Jeonghan was accused of being a changeling. They meet once again as Seungcheol is dying.

When Kyungsoo comes to, he is surrounded by dark fae. One of them calls him a thief, demanding compensation.

"I will return him to you, little faerie. But first, I need him."

Taemin might be a little more than human, but his fiancée might be a little late figuring that out.