Simple 2000 Series Vol. 34: The Renai Horror Adventure - Hyouryuu Shoujo (2003)

The Renai Horror Adventure - Hyouryuu Shoujo: It's a summer night and school shouldn't be where you're at but there you are with five lovely classmates. It's a group study session but an strange occurrence plunges the school underground and traps you and cohorts inside the storied halls of learning. Use the resources of your classmates and your own knowledge to find a way out of the school and return to your plain-Jane life.