I had returned to my hometown far away for a class reunion. We met up with my best friend and my first love Rio, who became his wife, at a park full of memories and headed to the venue. I felt nostalgic and lonely for Rio, who had become someone else's. Rio seemed to feel the same way, and after the first party, when we were about to leave, she invited me over to her house and confessed that my best friend had been cheating on me. I made the excuse that I wanted to save Rio, who was in deep sorrow, and we kissed as if to recapture those days...