The beautiful woman my brother married. I can't help but be aware of her presence as she interacts nearby, but since she's my sister-in-law by obligation, I try not to think of her as a 'woman'... Until one day, I unexpectedly opened the bathroom door to find my sister-in-law completely naked!! Surprised, she tries to hide her private parts. A drop of water on her naked, beautiful body, and I can't think rationally anymore...