For Sakurai, Mayuko has longed for her since she was a child and is her first love. He was more than a friend's mother. I don't know how many times I've pulled out with Mayuko. Mayuko and now alone. And now I'm no longer a helpless child. Sakurai couldn't control his feelings. Mayuko, who is suddenly pressed by her son's friend, is surprised and resists. However, when he heard the young man's pure words, "I decided that my first partner was Mayuko!", I weakened my resistance.