HuangSu

HuangSu is the het ship between Mei Changsu and Mu Nihuang from the Nirvana in Fire fandom.

Before Chiyan Conspiracy
Lin Shu and Mu Nihuang were childhood friends along with Xiao Jingyan. They used to play by the river and Early on, although not exactly told when, Lin Shu's father Lin Xie arranged for Lin Shu and Mu Nihuang to be married. Lin Shu and Mu Nihuang were both very happy about this. They planned to get married, however their plans were foiled.

After Chiyan Conspiracy
When Mu Nihuang first sees Mei Changsu (Lin Shu's alias), she thinks there is something on him that reminds her of Lin Shu. Mei CHangsu helps her get out of her arranged marriage with someone else. Her instincts are exemplified by Empress Dowager, who has dementia but is still able to recognize Mei Changsu as Lin Shu. The Empress Dowager asks if Mu Nihuang and Mei Changsu are married yet, and when they reply no (at this point Mei Changsu's identity as Lin Shu is not revealed yet), she says that they have to get married soon. Mu Nihuang finds Mei Changsu after the incident, talking to him about her issues and her past with Lin Shu.

A few days after, Lin Shu realizes that Mu Nihuang is in danger but does not send troops or alret anyone, making Xiao Jingyan furious but Mu Nihuang even more sure of her theory. The winter passes and nothing significant happens, but Mu Nihuang and Mei Changsu do meet up on occasion. One day, when Mei Changsu is out meeting some old friends, Mu Nihuang follows him and subtly reminds Mei Changsu that she knews who he really is. Mei Changsu, however, does not acknowledge their shared past, until Mu Nihuang demands that he let her roll up his sleeves, revealing smooth skin without any scars. Mei Changsu keeps denying his past until Mu Nihuang hugs him and demand that he never leave her again.

Fanon
is a decently popular ship in the fandom. Many people like their sad backstory and that it's a semi-canon ship, others think that they would be better off as friends. Some fans object to this ship, as they believe Mei Changsu no longer wants to be associated with his past. Many people draw them taking care of Fei Liu together. The poly ship with Xiao Jingyan, JingSuHuang, is also decently popular. The main rival for this ship is Jingsu, with MengShu being much less popular.

On AO3, there are 150+ fanworks for the pair.

Fandom
FAN FICTION

Trivia

 * There is an entire song dedicated to Mu Nihuang singing about her loss of Lin Shu (红颜旧).

Variations

 * JingSuHuang refers to the ship between Mei Changsu, Xiao Jingyan and Mu Nihuang