Kyosuke, an editor at a publishing company, keeps his concerns about his stagnant relationship with his wife hidden. As he struggles with his feelings, he meets Reika, the lover of a talented up-and-coming novelist, and becomes obsessed with her.
Cheating Notes
There's tension between the editor and the up-and-coming novelist's girlfriend in a cabin, with her out of her clothes because she fell on the lake earlier (23:13). They fuck for the first time at 36:52 and then at 57:03. They're long, sensual sex scenes.
Meanwhile, a young guy has taken a fancy to the editor's wife at the public pool. He tries to kiss her at 51:42, but she pulls away, telling him that he has a husband. Nevertheless, they start hanging out after that. He gives her a ride and also visits her at her place.
(Spoiler)
The husband and the novelist's girlfriend come home to his place and find his wife and the young guy together... but what kind of being 'together'?
https://www.jukan.tv/play/207612-1-1.html
Thanks.