Loneliness
This tag is to be used if the novel features character(s) that either feel, or are truly, alone for a significant portion of the plot. This experience is emphasized.
Song Nanyin had been having a rough time lately.
For one thing, the new boss who had parachuted in as her superior turned out to be Liu Zhaoran, the same old nemesis she had never gotten along with since university.
For another, her body had begun showing strange, unspeakable abnormalities. Then, of all people, Liu Zhaoran offered to help examine her.
What could possibly lie behind such sudden kindness?