12 years ago, Seimi divorced her husband and raised Tatsuya on her own. Tatsuya, who grew up receiving his mother's love, successfully found a job. Although Seimi felt relieved that child-rearing was over, she also felt a bit lonely. Meanwhile, Tatsuya invited Seimi on a trip during his day off. He planned to confess to his mother during this trip that he had always liked her as a woman.
