The Rules of a Lace Boss: The Sin of Sexual Immorality and the Poison of Pleasure (CMC-305)

Yui's father passed away after remarrying Hourai. As Hourai's stepdaughter, Yui and Hourai are close in age and have a good, friend-like relationship, living together. Yui can't forget the bewildered and intoxicated expression on Hourai's face when she was bound, a memory she secretly witnessed. She harbors a secret crush on Hourai but never confesses. One day, they discover they understand each other's feelings... knowing it's the wrong path, they still fall deeply in love.