Orochi Musou fanfic, with a lot of CP, the main theme is the four-cornered love triangle of Yun Yuki and Sansan Yuki (!?)
The rest (including those hinted at in just one sentence) CP: Jiang Lu, Yu Liang, Gan Ling, Xiao Taiban.
There are a lot of bugs, so please read it as a third-rate romance.