※ This book contains elements of coercive relationships, SM, and somewhat violent scenes, so please be advised when using it. Due to their parents' remarriage, Sua and Jueun become step-sisters. Due to a certain incident, they enter into a secret contract just between the two of them... "Do you think I'm easy?" As she fastened her loose button, Sua said. "Am I your toy?" Jueun remained silent, only fiddling with her reddened lips. After a moment of silence, Jueun took a step closer to Sua. For a brief moment of surprise, Sua quickly hardened her expression as if nothing had happened. "You’re not planning to leave like this, are you?" Jueun licked around Sua's lips like she was enjoying an ice cream. "Unless you plan to brag about kissing me, just stay quiet." Then she brushed her finger down Sua's lips with a sly smile. "Are you ready to be punished?"