Yumika is reunited with her husband after a long time, her desire to have a child growing stronger. Upon hearing this, her father-in-law suggests teasing her in front of her husband to provoke jealousy. But when her husband shows no reaction, the father-in-law's actions grow increasingly aggressive. Eventually, he forcefully grabs her husband's penis right in front of her. Witnessing the scene, Yumika becomes aroused by her father-in-law's advances, leading her into a secret affair with him despite their caregiver-patient relationship. Drawn into intense, passionate sex with the older man, Yumika even proposes working together with her father-in-law on conceiving a child. This shocking turn of events is about to begin.