Narumi, who divorced her husband 12 years ago, has been raising Tatsuya on her own. Tatsuya, who grew up receiving all of his mother's love, has successfully found a job. Narumi is relieved that her child is now grown up, but she also feels a little lonely. Meanwhile, Tatsuya invites Narumi on a trip on his day off. He has been thinking about confessing his feelings to his mother on this trip. That he has always loved her as a woman.