Ever since my son lost his father when he was young, Mai has lived with him for a long time. My son, whom I took great care of, grew up without a period of rebellion, and successfully graduated from university and found a job. However, when she learned that she was assigned to Kansai, Mai panicked. For Mai, her son had become more than a son. She invited her son to a hot spring trip to make it the last memory of her alone.
