NACR-579 Nanako Hayata, A Sister-In-Law Who Was Made A Sex Slave By Her Husband's Younger Brother

I was happily married with a loving husband. Until my husband's younger brother who stays at home without getting a job suddenly changes. In the beginning when we lived together, my brother-in-law was kind and dependable. But one day, my happy days were destroyed by my brother-in-law. I was raped. When my husband went to work, I was toyed with by him and trained.