Slender married beauty Mirei Imada lives next door to a voyeur who secretly films her every day. After spotting her masturbating through a gap in the window, he waits until her husband is away, barges over, and forces her to suck him at the entrance before ejaculating into her mouth. He pushes inside and takes her to the bed. His cunnilingus gradually makes the initially faithful wife yield; she masturbates while sucking his cock, then eagerly mounts and grinds on him after he penetrates her bare. Before long, she has completely forgotten about her husband.