He Does It Better Than His Older Brother

During a family trip to a quiet pension, Eunchae secretly sneaks into the room of Seunghyun, the man she has a crush on, and boldly tries to kiss him. But the person who responds roughly in the dark is not Seunghyun—it is Kang Taeyoon, her sworn enemy. “What? Is it because I’m not my brother? Don’t worry. I’m bigger.” After that fatal mistake, Taeyoon seizes Eunchae’s weakness and proposes a provocative one-month bet involving a “collar.” Will Eunchae be able to win this dangerous bet and keep her place as the “master”? Or has she already walked straight into the trap he designed for her…?