I've been married to Naoki for two years, and wanting to have a child soon, I've been researching the best time to get pregnant from my ovulation date and working hard to make a baby. Tonight was that day. However, Naoki brought along his friend Oki, who was in the area on a business trip. I didn't notice the sharp expression on Oki's face. And the next day, I was called out by Oki and raped. He came inside me even though it was my risky day, and since then, Oki has come to visit me every month when I'm on a business trip. Even though that time of year is always my "risky day"...