While my family was away, my cousin stayed at my place for three days. She looks childish at first glance, but she's deeply curious about sex and teasingly seduces me. She boldly asked, "Onii-chan, don't you want to do it with Yui? I want to." She actively tempted me until we ended up having unprotected sex. After that, she kept inviting me again and again—"Hey, I can still go, let's do it one more time"—luring me into the bathroom, bedroom, and even sneaking under my futon when I woke up. For three days straight, creampie sex continued, and this is the full record of it.