拘束 ～悦びの淫液～

A young man named Keisuke falls asleep on a train and sees a dream: he is having sex with a beautiful woman whom he calls Miyuki, even though he doesn't know this woman in his real life. Afterwards, Keisuke misses the last train to the city and is stranded on a rainy day on a small, uninhabited station. Suddenly, he sees the woman from his dream, and finds out her name is really Miyuki. She tells him and her rich father has built for her and her sisters a European-style mansion nearby, and invites the young man to visit. Keisuke accepts and meets her family, which leads to unexpected and dark erotic adventures...

[From Moby Games]