NACR-734 Mako Oda, a perverted big-breasted wife who secretly films herself having sex with others to please her husband.

I ended up staying with my brother and his wife for a while for a job interview. One day, my brother's wife, Mako, entrusted me with the key to her study, asking me to take a look at her brother's collection. On the computer in the study were hidden camera footage of Mako masturbating and having an affair. When Mako is questioned, she discovers that the camera was set up by Mako herself.