Rui single-handedly raised Tatsuya, sent him to college, and before he knew it, it was the year he graduated from college, and he got a job in the real estate industry. This is the end of parenting. The thought made her feel like a gaping hole had opened in her heart. When spring comes, Tatsuya ends up living alone in Tokyo. While he was feeling lonely, Tatsuya invited him to a hot spring trip. "I want to go on a graduation trip with my mother who let me go to university."
