"Ding~ You have a friend request from Mona Lisa, agree or accept"
In each plane, only one person will receive this option, and "a Mona Lisa" will be with him or her until his death. After his death, no other person in this plane will receive it.
There are men and women, old and young, heinous villains, and men and women with the heart of the Holy Mother.
More or less, they once had happiness, but life forced them. So, one day, "a Mona Lisa" came to them, gave them answers to their problems, and helped them become a happy person.
(The ancient times --- General He Qinghe, the modern --- Miss Mo Yumo, the future --- Ah Si plant spirit, the king of anime --- Fujigumo Zhizi the reborn, the mixed martial arts --- Ling Ruojian Sanwanhua time traveler (meaning the sword three natives travel through the mixed martial arts), etc.)