This is really not mechanical ascension - Chapter 890 - 460: Undercurrents (Happy New Year’s Day, Happy New Year!)

The servant looked at the grieving princess. “Your Highness, the Regent Prince sent your scholar fiancé to the Western Butcher’s daughter!” 

The princess gritted her teeth, speaking to her servant that it matters not as she has other suitors in line. Many days later, much to her dismay, the servant ran in a hurry. “Your Highness, the Regent Prince expressed his intention of becoming your suitor! All other men in line were sold to Gou Lan Red District!”

The princess was distressed. She said to her servant it matters not. She’ll soon be married to Prince Fuma. Then the uneventful came. The servant once more ran to her, almost tripping in the process. “Your Highness, Prince Fuma was imprisoned at home! Meanwhile, there’s a red sedan chair waiting at your residence for your marriage! It was led by the Regent Prince!

The princess was stunned. For a day such as this to come, it seemed impossible. This nothing but a sad story of a female boss crossing back in time to hold the thick thighs of the big boss. But while raising him, she was eaten in the process.

- Description from Novelupdates

“CRASH!” the last sound he heard; the last image being the smile of his friends.Jotou Howllett, a twenty-one year old nobody who finds little to no purpose in his life, wants to be a freelancer to make it big whilst trying to avoid education. He spends his last day of freedom with his friends before he's forced by his parents to attend college. That last day became his true last day as a white light flashed and he opened his eyes in a coffin, suffocating. He, now she, found herself to be in the body of a woman who had recently passed away. Jotou comes to realize that she's no longer in her world and now is in some sort of fantasy world. The rampant problems in this world soon find themselves surrounding Jotou, from the magics to the monsters to the wars between kingdoms and cities. Jotou sets out to uncover how she got here, why is she here, is she stuck here? Alongside the companions she finds in her way.

Long Chen, a crippled youth who cannot cultivate, is constantly targeted and bullied by his fellow noble heirs. After a particularly vicious beating, he wakes up and realizes a Pill God’s soul has somehow merged with him, giving him some additional memories. Within those memories is the mysterious Nine Star Hegemon Body Art, a cultivation technique that even he can train in, but whose secrets and origin are still a mystery to him. Relying on his improved instincts as he finally begins to cultivate, he realizes a huge conspiracy is underfoot within the Phoenix Cry Empire, one involving his father, members of the imperial family, and even the Emperor himself.

Roan, ran away 20 years ago from his rural village in the aim of becoming a Great General. However, all he got 20 years later was just a handful of money and the lowly position of squad commander of the First Legion’s.