MTL - The Rise of Space Technology - Chapter 207 , small aircraft engine

Yeon-woo had a twin brother who disappeared five years ago. One day, a pocket watch left by his brother returned to his possession. Inside, he found a hidden diary in which was recorded “By the time you hear this, I guess I will be already dead….”

[You have become the master of the Warden Mansion.][Your first quest is to refine mana from one of your maids by having intercourse with her.]When nineteen-year-old Jett Talon suddenly wakes on an emperor-sized bed, he finds himself lord of a mysterious mansion where countless gorgeous maids stand ready to serve. His first companion is Mia, a blonde elven maid who checks his every box. After making love to her, Jett gains mana, unlocks legendary powers, learns his duties as Master of the Warden Mansion, and uncovers its hidden secrets.

At the height of her power, the Supreme Goddess Amane also known as the Beast princess sacrificed herself to save the life of children she had adopted throughout her life. That should have been the end of her story. Amane had achieved her ultimate goal of saving the lives of her loved ones and her sacrifice would give them all decent lives. But the Supreme Goddess felt her eyes opening in a new body and a new era. She had been reincarnated into the body of a Yoko Tsurugi, the mentally-challenged adopted daughter of the Tsuragi family (The family infamous for their beast-taming business) Reincarnated in a new body with no knowledge of why she had been brought back, Amane decided to embrace her new identity and live a carefree and easy-going life doing what she was known for before. She would do what the previous owner of her body was unable to do - Show everyone why you did not mess with her, the supreme tamer of beasts. The new era was different with no ‘alliance’ or distinction between races. The world was a calm place that seemed to have a place for everyone. Amane, now Yoko, should have a decent new life. But the past refuses to let Amane go and the circumstances behind her resurrection were becoming more and more complicated. It was more than clear that something seemed to be brewing in the background of this new era. And the balance of power was not as even as it first appeared to be. Who had called Amane back in her new body? And for what purpose was she brought back? These questions might be more important than they first appear to be.