Mother Izumi who lives with her son in the house left by her parents after divorce. One day, she was accidentally helped by Shimizu, a renovation company, when she was entangled with her husband who came to ask for her money even after the divorce. The good-natured Izumi, who doesn't even know the world at all, takes this opportunity to become close to Shimizu... She even allows her body to be swept away. After that, Izumi completely accepts Shimizu, such as having her watch her son study, but only the words of her husband, who left her saying, "Be careful with Shimizu," caught her in her chest.
