Beast

A group of friends led by Muneto are exploring a forest, but are forced to take shelter in a mansion when a rainstorm comes. They are invited in by the mistress Kiriko. But something isn't right inside the house and Muneto wakes up to find his friends missing.

The player navigates the mansion and the secreted caverns below with menu options. Each girl can be found progressively in a bondage situation in which the player can rescue to gain some sexual favors. From time to time, the player will also come across grotesque beasts which can only be dealt with very specific actions. Eventually the player will find out that Kiriko is not what she seems. The ending is determined by making it out of the mansion alive.