Ayame and her sister know that their dad's been lonely ever since their mom left home. Like any good daughter, they just want their dad to be happy and help in any way possible. And we do mean, Any. Way. Possible.
Maro works as a doctor. One day, Sakimi and her husband comes to the doctor's office cause of a small pain in Sakumi's breasts. He begins to gain her trust and gives her advice about married life, with a keen interest in her sexual habits. One thing leads to another, and voila. Netorare.