Izumi, a mother living with her son in the house left by her parents after a divorce. One day, she is harassed by her ex-husband who keeps asking for money, and is accidentally saved by Shimizu from a remodeling company. Izumi, who knows little about the world and is kind-hearted, becomes close to Shimizu because of this incident… She even ends up giving herself to him. Afterwards, Izumi fully accepts Shimizu, even having him help with her son's studies. However, the words her ex-husband left behind, 'Be careful with Shimizu,' linger in her heart...
