My 10 year old daughter said she wanted to have a birthday party. On that day, her classmates came to congratulate her. She should have had a good time. But… time passed and her daughter became a middle school student. By chance, I reunite with the woman who was her homeroom teacher at the time and learns the truth about her. “Congratulations” for her birthday. And the word “thank you”. I wrote this story with special thoughts on these words.