Mirei has been married for four years. She continues infertility treatment but hasn't been blessed with a child, repeatedly having obligatory sex with her husband. One day, her brother who came to stay suddenly tries to rape her. Her brother's fierce desire awakens Mirei's dried-up womanhood, and she accepts him. The brother starts training Mirei during the daytime when his brother is absent. Their father witnesses this and begins forcing oral sex on Mirei. After internal ejaculation training by both her father and brother, Mirei becomes pregnant...
