Ancient Sword: Never Forget, Look Back

I always thought I was the only one in your heart, until his arrival drove us farther and farther apart. Ling Yue, do you know? We have always had a past together, one we can't forget or erase, yet can never return to. Once you've seen the ocean, ordinary waters won't do; once you've seen the clouds over Mount Wu, no others can compare. Don't forget to look back, for youth doesn't last. This story pairs Duan and Yue. Ahem, this time I won't leave the ending hanging... I'll do my best. Still a short story, just practice. Theme: