Kiichi Mutô

A businessman, Tsuda, runs into a childhood friend, Kojima, on the subway. Kojima is working as a semiprofessional boxer. Tsuda soon begins to suspect that Kojima might be having an affair with his fiancée Hizuru. After an altercation, Tsuda begins training rigorously himself, leading to an extremely bloody, violent confrontation.

Mitsuko has a prestigious job as an editor at a publishing company, while her husband Tomatsu works as a freelance photographer, but he spends all of his time taking care of housework. One day, Mitsuko suspects Tomatsu is having an affair with Mayu, a model, and immediately throws him out. With no place to go, he moves in with Mayu, disrupting her affair with Nakazaki, who happens to work with Mitsuko.

Asami and Rina are two sisters who are both professional shogi players in the same B League. Both are also unsatisfied with their partners — Asami is in a slump and is danger of slipping into the C League and she blames her husband Kazuya, and Rina is tired of her boyfriend Hiroki, an unsuccessful musician.