(Alias: I actually coexist with my mortal enemy?)
Chu Yunlan of the Qingyun Sect and Xiao Jin of the Xuanyang Sect are recognized as mortal enemies in the world of cultivation.
During the sect competition, Xiao Jin picked up Chu Yunlan's hair crown with a sword, and the black hair fell like a waterfall.
"Chief Qingyun, that's all." Among the crowd laughing, only Chu Yunlan could clearly see the subtle trembling of his fingertips.
Late at night, Chu Yunlan's old injury recurred and he coughed up blood. The mirror reflected the strange black lines spreading across his heart.
In the Xuanyang Sect's forbidden area, Xiao Jin tore open his sleeves, and the same black lines looked as ferocious as a living thing in the moonlight.
"Heart-corroding Gu..." He wiped away the blood on his lips, "Chu Yunlan, you must... Don't die too early."
No one knows that these old enemies are actually infected by the same vicious curse day and night.
No one knows that every time they fight with each other, they are sharing the heart-wrenching pain for each other.