After Jin Yuan read a fairy tale romance novel with deep sadomasochism, he was honored to become the younger brother who only appeared once in the book. This younger brother disappeared during a certain downhill experience. Only then did the heroine take his place.
Fortunately, he became the original owner before going down the mountain to experience, and he successfully kept his position...
But, the heroine still becomes his third senior sister?
While Jin Yuan was watching the heroine and his master having a sadomasochistic love affair, he successfully hugged someone's lap
"Hey! The master and servant have a deep love as promised!!"