The young couple Mizutori is very happy and joyful until the husband, due to being too focused on work, neglects his wife and children, leading to a very serious consequence. Indeed, losing a wife to a friend is a reality. Having been close friends for a long time, the husband often invites his friend to the house to hang out and discuss work. Unfortunately, this friend happens to be very lustful, and in moments when the husband is busy working, he takes advantage of the opportunity to seduce and have sexual relations with the wife due to his inherently promiscuous nature. Partly because the wife is disappointed that her husband no longer loves her as before, and partly due to her promiscuous nature, Mizutori's wife has been lenient in allowing the husband's friend to do whatever he wants, including engaging in sexual relations. It's a pity for the husband, who works hard and sacrifices everything for his wife and children, only to be betrayed by his own friend and wife in such a heartless manner.