They live in the same world, but they pass each other; when they meet, they turn into smoke. Love is too short-lived for them. The two names Yun Moyu and Ye Xuecheng are like day and night in the world, destined to intersect but never meet. "I love you, Yu! But he also needs me!" "What do you want, we are no longer together!" "Cheng, maybe I should let you go free!" "No~", "Xiao Cheng, we are finally together again, but you still think of him in your heart!" "Hmph~ Don't you? We said we were in love but it wasn't love at all! " "Yu, tell me this is not true, you are not with her, tell me!" "Cheng, I'm sorry, if I had the chance, I would never say, I love you!"