Mu Sisi failed Ji Huaiqing, who loved her most. When she was an orphan without a father or mother, Ji Huaiqing protected her, but she always thought she was not worthy of him, and she did not agree to him until her death.
Mu Sisi followed Ji Huaiqing after her death. Ji Huaiqing went to all the places Mu Sisi wanted to go, and finally died in front of Mu Sisi's tomb.
The two kept entering new worlds, constantly solving misunderstandings, and finally ended successfully.