EIKI-048 - Secret Affair: The Wife Who Gives It Up for Free

It feels like some kind of compilation. In short, it's nothing but sex scenes. According to the wiki, it features 10 people including Mio Kayama, Yuri Ashina, Aya Kisaki, Miko Komine, and others. Just from what I could recognize, Mao Hamasaki and Nagomi were there too. Nagomi doesn't really give off a 'married woman' vibe, though. It starts with a kiss, then insertion and creampie, then moves on to the next person.