VAGU-288 [Uncensored Leaked] My wife's sister-in-law was flashing her panties on the last train and noticed my erection and started seducing me. Kaoru Yasui

It's been a few years since Kaoru started living with her sister and her husband. She gets along well with her brother-in-law, Tatsuya, and is content with their fun life together. One day, during a busy season at work, Kaoru gets on the last train and dozes off, probably from exhaustion. Unconsciously falling asleep, Kaoru jumps up in a panic to find Tatsuya standing in front of her, peering up her flipped-up skirt and getting his cock hard...