Kaiki! Drill Otoko no Kyōfu

Three sisters got lost in the woods and found a mansion in which they decided to spend the night. However, they are not alone in the castle. It is inhabited by a Drill Man, who seeks to rape them upon meeting them. The player's task is to discover the mystery of the mansion as one of the three sisters, avoiding the Drill Man and other situations in which they can be raped. When the girls are pursued by the Drill Man, they must find a place to hide from him or an object to throw at him to run away. But there is a chance that he will detect them when they are hiding and then they need to move the mouse quickly to avoid his attack. The game is over when the players fulfill certain conditions that lead to them being raped or when the drill man takes all of the girl's clothes off.