If a shape-shifter falls in love with Tang Yan, what is the probability that Tang Yan will also love him?
If a shape-shifter named Xiao An falls in love with Tang Yan, what is the probability that Tang Yan, who has a tear-stained scar under his right eye, will also fall in love with him?
[Background science:
An Yan: The dual male protagonists of Teng Ping's "Night Walk" series of novels - Xiao An
The timeline of this article follows closely from the original work]
Intention: