Demi-human Girls Completion Manual - Chapter 15 - . The so-called transaction

There was once an immortal cultivator fighting for the fate of human beings. Unfortunately, he failed that time; but fortunately got another chance as he was reborn once more as a human, on the earth of 5,000 years ago. With a second chance, he not only would embark on the road of saving all mankind, but also would retrieve his human nature on the new journey that would last for 5,000 years.

- Description from Novelupdates

Seven days remained until the countdown to genetic mutation.Seven days later, all creatures on Earth would undergo mutations. Giant mutated creatures would swarm and attack humanity, putting their fate in jeopardy. The entire Earth would be ruled by these mutated beings!Yang Xiao accidentally walked into a genetic store where various gene potions were sold, capable of altering human body functions.From that moment on, he embarked on a crazy journey of genetic evolution.

Why did an incubus become the most coveted species among the most powerful and sought-after empresses, even by primordial goddesses?!

There is a famous legend on the ALZANIA planet. Who says that once every hundred thousand years, an incubus will be born, through a mystical ritual. He will possess mysterious powers that could allow any empress mage to reach divinity, any goddess to achieve supremacy!!....... But would the possessor of such power have the blessing of a peaceful life?!------

Follow the daily life of Alvine, who had just opened his eyes, who suddenly found himself in the body of a boy celebrating his 18th birthday.

[ Ding!! ....]

[The host has reached the age required for activation of the succubus gene ]

[The transformation process into an incubus will begin in 5 seconds... 5....4...3..2..1...]

Mu Zhiyan, after being transmigrated a millennium (1000 yrs) into the future, discovered that he was raised by his adoptive parents as a tool for them to access the heritage his (dead) biological parents left behind. When he was at a loss for what to do next, he discovered that his body hosted an additional
pharmaceutical system.

For a chance to return to his era of Earth, Mu Zhiyan decided to practice and practice; he must train the system to full level as soon as possible.

However, reality gave him a slap in the face. The world is dangerous and dreadful, making Mu Zhiyan recall his mother’s words of holding a thick thigh, resulting in him locking his eyes on a cool general…

So the rumored mysterious Mu Master faced General Han with a serious face: “I allow you to follow me, General Han.”

General Han: “…”

- Description from Novelupdates