One day when my sister-in-law Reiko came to stay. Reiko, who had a slight cold, fell sick and fell asleep for a short time after enjoying her reunion with her sister-in-law, Yumi. Yumi devotedly takes care of Reiko, feeding her porridge, but gradually her hidden desire begins to awaken. Then, he kisses Reiko's moist lips while she is sleeping, and drags her hesitant sister-in-law into the world of lesbians...