The tall, H-cup, busty female instructor next door, wearing a see-through swimsuit, seductively rides me in a cowgirl position. I, Asuna Hoshi, am being played with by a slut so much that my sperm is almost dried up, hiding it from my wife. (BF-719)

I only ever greeted my neighbor, Asuna. However, a certain incident led to a closer relationship, and she started visiting my house. I'm married and live with my wife. While I felt some resistance, I also felt a sense of anticipation… When I entered my house, Asuna appeared wearing a swimsuit. And that swimsuit was see-through… We became immersed in a relationship we couldn't share with anyone.