Mamotte Agetai. ~Dear My Master~

Our hero has led an ordinary and uneventful life up to this point. One day, 4 beautiful girls suddenly come to our hero's front door; they want to help our hero protect the world from the forces of evil. Obviously our hero is completely bewildered. The world is in grave danger, if they don't stop the reckless use of the weapons that his ancestors help develop. These cycloid girls have been sent to support our hero who has the potential of possessing powerful supernatural powers...

This set up sounds pretty heavy, but this game is really a bright comedy. These cycloids are basically the hero's servants, so he can have sexual fun anytime and anywhere he wishes. Furthermore, this develops into quite the love story with our hero's childhood girlfriend Yui getting caught up in it all. This game is composed of two parts: The school part and the home part. The home training part is especially important; for it is here that our hero's supernatural powers are awakened. Within this game, there are some powers that cannot be awakened simply with serious training. It's your assignment to acquire these special powers and use them in this sexual battle!

[From gamelexgs]