Lustful Laughing Nurse

Based on the manga by Yonekura Kengo. In a hospital resides a nurse who chooses to have fun with a patient and even drags this patients childhood friend into their event. In a home resides a brother who eventually sees his sister playing with herself as she watches adult movies which eventually drags them into incest. And in another home resides a woman and a girl who can't keep their urges hidden from a friend.