Because of the alumni association, I was returning home to a remote hometown. At the park of memories, I joined my best friend and my first love, Rio, who became my best friend's wife, and headed for the venue. I felt her nostalgia and loneliness in Rio, who had become someone else's. Rio seems to have the same feelings as her, and after the first party, she invited me to go home and confessed that her best friend was having an affair. With an excuse to save Rio, who is sad, we put our lips on top of each other to regain those days ...