We are a married couple who have been married for ten years... Aoi's wife is an officer in the neighborhood association, and I have secretly entered into a "second partner" relationship with her... A "second partner" is a type of "second partner." Although we both have partners, Aoi and I continue to have an affair with our neighbor as "second partners" to satisfy our sexual desires. I can't stop because I'm addicted to her overly erotic sex...