At the suggestion of her husband, who was worried about her father-in-law who was suffering from advanced dementia, Akari and her family decided to go on a trip to "a place that holds memories of her father-in-law and her late mother-in-law". However, when they arrived at the inn, her senile father-in-law called Akari her deceased mother-in-law Yoko and asked for obscene care. He said he would help her with her meals, but he passionately entangled his tongue with hers and then began to demand sex. Feeling sympathy, Akari ended up having a physical relationship with him...