STAR-690 Haruna Osaka, a married woman's bondage awakening. A frustrated wife who brings a man into her home when her husband is not around and indulges in pleasure.

Haruna is sexually frustrated by a lack of sex with her husband, and spends her days browsing posting sites and masturbating. She meets a man named Sato through the internet and gradually becomes immersed in the world of bondage. Includes "First bondage sex," "Training bondage deep throat while wearing bright red lingerie," "Flipping the table and being tied up in an X shape with her hands and feet tied and toyed with," and "First ever bondage threesome with strangers."