Looking for a Quick Time Travel Article from a Long Time Ago 求一个很早之前的快穿文

There is an ancient dimension where the original protagonist was the childhood sweetheart of the male protagonist. Later, the male protagonist became the emperor and fell in love with the female protagonist. After driving the original protagonist into the cold palace, he and the female protagonist got together. The female protagonist traveled to the time when the original protagonist was sent into the cold palace and came out of the cold palace with the token of the good male protagonist when she was a child.