Because company training was being held in Tokyo, I came from the countryside to stay at my sister's place for about a week. Even though it was our first reunion in 12 years, we were strangely close, making my heart race. Seeing her again after so long, her breasts and thighs looked even sexier than I remembered, and despite knowing it was wrong, I couldn't suppress my growing excitement. Trying to hide my erection, I rushed into the bathroom—only for my sister to follow me in, catching me red-handed. "Hey, why are you hard? Did you get turned on seeing your big sister's breasts? Were you imagining something dirty? Haha!" From that moment on, we started getting intimate every morning and night. She gave me titty fucks and blowjobs, deflowered me, and we did slippery, wet sex. Wait—she's this skilled? I later found out my sister actually works as a soap prostitute. But I don't care! Because she's warm, soft, and wraps my cock completely—she's my one and only personal prostitute in this world!