Tomoka and Misato were famously pretty sisters. They'd lost their father to illness. Time had passed, and their mother remarried. Now the girls were maturing, and their stepfather was loving and proud. Yes, until that day...... Rain fell suddenly after school and drenched Tomoka. She came home and plucked her wet undergarments from the clothes hanger while her stepfather stared at her in a strange way. Her uniform was soaked. He suddenly touched her -- and she felt a fear of this man for the first time. That night, sleeping as a family side by side like always, Tomoka's stepfather crept over into her futon. Their mother was right there, her own sister... but he would not be stopped. He forced himself on her. To keep him from molesting Misato, Tomoka let the man do as he pleased. Even so, one day she came home from school and saw them---.