HBAD-389 Hiro Aikawa, an unfaithful wife who was captivated by the violent piston of her neighbor's worker in front of her husband.

A civil engineering worker moves next door to a married woman, Hiro, and when he comes to greet her, he looks at Hiro lewdly. Hiro complains that she can't stand the civil engineering construction worker's excessive behavior, who makes a lot of noise at home every night, watches porn at high volume, and doesn't separate trash. She gets angry at Hiro's complaint, and the civil engineer, who has always thought her to be a good woman, takes Hiro to her house and attacks her.