Yurina, who lives with her stepson after losing her husband, was aware of each other as the opposite sex. One day, they go on a hot spring trip together. Her son confesses his love... Yurina stands up to go to the bath, but she is kissed by her son. At first, Yurina is conflicted, but eventually she succumbs to the waves of pleasure and allows her son to have her body. It turns out that Yurina also loved her son. Even though they are parent and child... We will deliver a hot spring trip of incest mixed with conflict and pleasure.