Anime Porn - Dark Blue 1

Based on the erotic game by Lilim Darkness. A group of people go on vacation to a summer cottage, unknowing of the dangers they will face throughout their stay. A school doctor who is accompanying them intends to blackmail one of the women in the group after obtaining her journal. Relationships are hazy, and when one of them dies, mayhem ensues. Escaped prisoners have reached the area and destroyed the main bridge, making these folks unable to flee. What will they do now that they are imprisoned and terrified?