Ever since her husband died, Anna, a mother, has doted on her son, Takayoshi. She loves him so much that she even takes care of his sexual needs, but her friend Yota finds out about it... Yota had originally approached Anna wanting to have sex with her, but then he forcefully pushed her down. From that day on, Anna was at his mercy and played with. She obeys him, not wanting her son to know about it, but one day, Yota comes to the house and, of all things, right in front of Takayoshi...