The story takes place in a coffee shop that has been in business since the Showa era. There is a magical seat in this coffee shop. People sitting in this seat can go back to a certain day in the past they want to go back to and relive the old days. The time limit is the time it takes for a cup of coffee to go from boiling hot to cold. People who go back to the past cannot interfere with what has happened, nor can they change the future, but even so, there is still an endless stream of guests who want to experience this magical moment. OL Kiyokawa Fumiko (Haru) who is entangled in feelings and reality and cannot make a choice, Hirai Yaeko (Yoshida Yang) who has been living a lonely life, Takatake Kayo (Yakushimaru Hiroko) who gradually loses her memory due to Alzheimer's disease, everyone has a day in their life that they want to go back to at all costs.