Valkyrie's Shadow - Chapter 17Before the Storm: Act 5,

Having transmigrated into the world of Journey to the West and become Tang Monk, equipped with a gaming system that allows for battling demons and leveling up, while looting equipment, from then on, the demons on the path to the Western Heaven were in danger. Monk Sha: Big Brother, it’s not good, another demon has been captured by Master. Tang Monk: You all listen to me today, it’s not you protecting your master on his journey to the Western Heaven to seek scriptures, but rather your master has to drag you all along, you know? Without you, your master alone would have fought, uh, made it to the Western Heaven by now...

Zhang Xiao Qiang is a nobody in this apocalyptic world with danger lurking everywhere, he is forced to wander around and learn the rules and principles to survive. Over the course of time, Zhang Xiao Qiang’s character and laziness slowly wore away from the experiences he faces. Zhang Xiao Qiang becomes more resilient, of course also gaining power whilst watching the lunatics of the apocalypse trampling on everything they could trample on. Zhang Xiao Qiang always maintained a bit of conscience in him. He never had the thoughts of being a hero, yet he doesn’t mind sharing bread from his plate. Zhang Xiao Qiang will continue to live in the cracks of the apocalyptic world until the crack can no longer hold him.

Zhangsun Zijun and Yi Xichen are the protagonists of the novel “Record of Nine Thousand Vicissitudes.” One is solid and reserved; the other is free-spirited and uninhibited. As fellow disciples under the same master who grew up together, the two have a deep friendship that was strengthened by their numerous life and death adventures together.

However, in a popular yaoi fanfiction, the personalities of these two characters is completely OOC. Zhangsun Zijun turned into an insanely jealous, insatiable s*x addict madly in love with his wife Yi Xichen. Yi Xichen turned into a sweet, delicate little angel. Their daily life was full of kinky bedroom activities…

Suddenly, the Zhangsun Zijun character from the fanfiction was transported into the world of the original novel.

- Description from Novelupdates

This is a story of a man named Kim Sae-Jin, who one day, inexplicably wakes up as a Monster. Follow him and his perilous journey to get his life back as a Human, all the while growing even more versatile as a Monster in the process. This should be… complicated, somewhat.