After her son graduated from university and secured a job offer in Tokyo's financial sector, she began to feel that her role as a mother was coming to an end. Yet, a sense of emptiness settled within her, as if she had lost her purpose in life. In April, her son would move to Tokyo to live alone, and though she felt loneliness approaching, she received an invitation from him for a hot spring trip. Marika and her son set off together on a graduation journey, just the two of them, creating new and intimate memories.