Hitozuma Kasumi-san / The Hills Have Size

Ryoji is a college student living on his own. One day he recieves a call from his Uncle's wife asking him to come over because her house has been burgled while she was shopping. Because his uncle is frequently gone on business it is agreed to have Ryoji stay in the house to help protect his aunt and her daughter. Gradually Ryoji becomes aware that his aunt is starved for sex. What will happen depends on choices made in the game.