It was about a year ago when I had my first infertility test and found out that the cause was with my husband... I started infertility treatment at the hospital, but I was also faced with the desperate reality that the possibility of getting pregnant was almost none. Rinko still wants a child with the person she loves. She desperately continued to explore the possibility of pregnancy, wanting to see the person's happy face. The last resort she chose was to ask her husband's biological younger brother to act as a sperm donor.