
Kanda, an elderly teacher whose manhood is beginning to fade, loves his young wife Ikuko, but finds himself unable to satisfy her high libido - until he discovers the world of spoiled cuckolds.
Cheating Notes

The middle-aged professor bangs his wife, but he isn't able to satisfy her and apologizes (00:01:01).
Toshiko, the professor's younger sister (or could be the wife's younger sister), visits them and brings her friend Kimura along with her. Kimura seems to also be a student/ex-student of the professor. The professor notices a spark in his wife's eyes when interacting with Kimura.
The professor starts inviting Kimura to come over more, and then leaving him and his wife to drink by themselves while he spies on them from a different room. In between these visits, he fucks his wife (10:50, 24:58) who seems to be hornier while having sex with him because of Kimura.
One night, the professor asks Kimura to help him change his passed-out drunk wife's clothes, but before she really gets undressed by them, Toshiko walks in on them. When the two of them get to be alone later, Toshiko asks the professor if he is into cuckolding since he's been inviting Kimura over a lot lately and might be planning to share his wife with him.
The professor's wife finds out about her husband posting her naked photos in an Internet chat group. She talks to Toshiko about it and basically, they come to the conclusion that her husband wants her to fuck Kimura.
Kimura makes his move on the professor's wife when they are again left alone by her husband. He tries to kiss her, but she is still conflicted about the whole thing and pushes him off her (54:30).
The professor's wife finally accepts Kimura's advance and has sex with him, on the floor and on the couch (1:04:24). Her husband watches them on his laptop and masturbates to it.
Summary
Nice. It's always hotter when the wife doesn't give in to temptation easily.
Where can I get the subtitles for this movie?
Can’t you see the link at the bottom?
there is a link for the movie but not the subtitles.
I have better movie where wife and a mother cheated on her husband. Very seductive