KSBJ-374 - Captivating Wife, Perverted Couple's Lewd Scheme, Ayana Onami

I coincidentally reunite with a senior from my college days and am invited to his home. The senior seems to be happily married to his wife. I am told to drink together and end up staying overnight at the senior's house. Late at night, while looking for the toilet, I witness the senior subjecting his wife to masochistic training. The next morning, the senior goes out, and the wife, left alone, tempts me with a strangely close feeling, but it was all part of the perverted couple's scheme...