Reiko has been raising her son as a single mother since she was young. Her love for her son has transformed into love for the opposite sex... Her son has also begun to see his mother as a woman. As time passes, her son goes to college and lives alone. Time passes, and they go on a long-awaited hot spring trip. The longing for their long-awaited relationship deepens their love. Reiko resists her son's sudden confession, but eventually accepts it. In fact, she loved him too... He kisses her, fondles her breasts, and gives her pleasure...