The second partner, keeping it a secret from his wife, is having an affair with his second partner; the sex is so addictive he can't stop... Aoi Yurika NGOD-228

Married for ten years, I've been having an affair with Mrs. Kui, a secret from my wife. This "second partner" is what's known as an "extramarital affair." Although we both have our own partners, we continue this affair to satisfy our sexual desires. I can't stop because I'm addicted to her excessively lewd sex…