A record of how she lost time and fell in love with her classmate who had become a married woman for the three days she returned to her hometown.

I was heading back to my far-away hometown for the reunion. We met up with her first love, Rio, who has become the wife of her best friend and best friend in a park of memories, and headed to the venue. I felt nostalgia and loneliness as Rio had become someone else's. Rio seems to have had the same feelings as well, and after the after-party, she invites me to her house as she is about to break up and reveals that her best friend is cheating on her. We made an excuse to save Rio, who was in sadness, and we held our lips together to help her regain those days...