Kim Rok Soo came to visit. He decides to prank Cale's friends. he technically didn't lie. Now When he Told Cale the prank plan Cale was in. so by the time Kim Rok Soo visit came to an end. Everyone was panicking that Cale had a lover and a whole life that they never knew of. Again Kim Rok Sok technically never lied. Neither of them did Based off a Fanfic I read. also only Choi Han knows of Kim Rok Soo. Imagine him sitting with us with popcorn. thats him