MTL - Dragon Inside - Chapter 119 The head has a please (tenth!)

Due to an unexpected turn of events, Xia Fei consumed a Super Gene Optimization Fluid that bore no brand, expiry date, instructions or stated its place of origin.
Our story begins here…

(Female disguised as a man) Accidentally transmigrating into Long Aotian’s male novels is not scary, what is scary is transmigrating into a villainous little boss who will be tortured and killed by the male lead! ! Jiang Ru decided to cling to the male lead and change his fate. However, the hero is too sick and delicate, what should she do if she still feels that she can’t survive? ! Of course, thirty-six strategies are the best way to escape! Jiang Rudong hid in Tibet, fearing that the male protagonist would take him back and execute him Ling Chi, but on the way he heard that this sick and delicate king had a white moonlight who loved him to death… Hey, wait! Why is this Bai Yueguang… the same name as her? ! ! ! One day later, Jiang Ru realized that those who came out to mess around… always had to pay off their debts with their own bodies.

- Description from novelbuddy

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

Jian Chen, the publicly recognized number one expert of the Jianghu. His skill with the sword went beyond perfection and was undefeatable in battle, After a battle with the exceptional expert Dugu Qiubai who had gone missing over a hundred years ago, Jian Chen succumbed to his injuries and died.