The Yeon family, under the protection of the Water Dragon, seeks the opportunity to be directly recognized by the Water Dragon as the head of the family! Jung-in, who has been living lavishly as a servant, has nothing to show but her social skills! She has only been like a suitable tongue in the mouth for her powerful twin brother, and like a unique friend for her troublesome sister, but she has been simultaneously chosen as the companion for both of their trials! "Wait, what about my opinion?" Caught between the ill-tempered twins, can Jung-in safely finish this tightrope walk once again?