Keiichi (Kenichi Hagiwara) is a weatherman. He gets involved with two married women, Yoshiko (Mitsuko Baisho) and Miyoko (Chieko Baisho). Both are trapped in meaningless marriages but couldn't bring themselves to divorce their husbands. While undecided about who he wants to choose, Keiichi witnesses passions boil to an unforgiving climax.
His main sex scenes with the rich man's wife are at 32:38 (non-nude) and at 1:19:12, where her side boob is shown. Aside from these, they have several other scenes where they kiss or have implied sex.
His main sex scene with the cafe owner is at 41:53 (non-nude). There are also other scenes where they kiss.