Pseudo time travel. The heroine fell in love with the wrong person and couldn't let go because of the guilt. She was also painfully entangled with her beautiful soulmate.
Wedge: The plum blossoms suddenly bloomed, suspecting that it is the king (from He Zhu's "Little Plum Blossoms" "One night the plum blossoms suddenly bloomed, suspecting that it was the king")
Have you ever had a long and painful dream? Even though you have forgotten the content of the dream when you wake up, your face is still filled with tears because of the pain, but you don't know what you are sad about?