One day, Reiko Nakamori, the younger stepsister, came to stay over, looking forward to reuniting with her older stepsister, Yumi Kazama. However, Reiko caught a cold and suddenly fell ill. Yumi tenderly cared for her, preparing congee and showing constant concern. Amidst this care, a long-suppressed desire began to awaken within Yumi. Unable to resist, she kissed Reiko's soft, moist lips as she slept, drawn by their warmth, and slowly began leading them both into a lesbian encounter. In the quiet room, their relationship took on a new, intimate form.