I have a sexual fetish.
It's the desire to see my beloved wife, Kanna, having sex with another man -- a cuckold fetish.

However, I simply cannot forgive her being cuckolded by another man.
So I asked my lesbian friend from college, Sarina, to sleep with my wife.

At first, Kanna was hesitant, but gradually she became absorbed in the pleasure and brought me to a climax I had never seen before.
Seeing her, I felt intense excitement.

--But after that, something started to seem strange about my wife.
Kanna started trying to meet Sarina even when I wasn't looking, and eventually she stopped listening to what I was saying.
And so, the two of them developed an extraordinary relationship...