Reika married a man with a stepchild. She and her husband are on good terms, but her son-in-law, Yuki, is introverted and their relationship with him is not going well. At that time, her husband suggests they go on a trip to a hot spring, and there they finally begin to open up. Yuki, who secretly had feelings for her as someone of the opposite sex, can't hold back and attacks her while she's asleep. I writhe violently at her caress, left to her youth and vigor.