MIAA-113 The most beloved sister in the S family falls into masochism after getting married... Natsuiro Miku

My older sister married into a very wealthy and venerable family. I had a hard time with her older sister who raised me as a surrogate parent for her. That's why I wanted to get married and be happy. Nevertheless…. Even though they were so close that they kept in touch many times, nothing was heard after the ceremony. Intrigued, I went to see her sister. There is no one in the mansion. When I secretly entered the room where the door was open, there was one DVD. It was written as "Record of impregnating a female slave". I had a bad feeling….