My Stepbrother Is My Secret Master

For two years, she has served a mysterious man as his devoted companion, always blindfolded and always wearing his collar, without ever once seeing his face. Her loyalty to him has been unwavering, built on a bond that exists only in the dark. But when the truth about who he really is begins to surface, she is pulled into a tangled romance with the stepbrother she has never known, where a hidden identity and a forbidden attraction threaten everything.