MTL - The Public Enemy of Tower Defense - Chapter 28 here she is

At the Tristain Magic Academy, her classmates call bumbling witch-in-training Louise Francoise le Blanc de la Valliere “Louise the Zero.” During an important coming-of-age ritual, when each student must summon their own witch’s familiar, Louise confirms her classmates’ opinion by accidentally conjuring up a normal teenage boy from Japan. Whether the two of them like it or not, the laws of magic bind them as master and servant forever! A hilarious novel with romance interwined.

A skilled but unfortunate modern-day assassin was killed in a freak accident. However, he soon found himself summoned to another world by an evil wizard, who had him possess the body of a boy as an experiment. After successfully planning the evil wizard’s downfall, he used the wizard’s body as a springboard to gain influence and power in his new world.

- Description from Novelupdates

In her past life, Meng Yu couldn't understand why her mother would give the university admission she worked so hard to earn to her younger sister and even sell her off to a remote village as a common wife, just to raise travel funds for her sister.Reborn, Jiang Meng Yu has just escaped from human traffickers, only to be caught by a 'buyer husband'. The fiancé her mother had originally set up for her, whose identity was usurped by her sister, comes to her rescue. She says, 'You saved me, I have nothing to give you as repayment but myself.' Yet when her mother comes, she coolly claps her hands and walks away with her.Captain Gu traps Meng Yu against the wall: 'Flirt with me and then want to run? No way!'Meng Yu resists: 'That was just a temporary measure for revenge.'Captain Gu leans in: 'We've planned everything, let's go with it. I'll help you take your revenge, and you just need to repay the favor.'A slightly silly Meng Yu asks: 'What favor is that?'Captain Gu smirks: 'The life-saving favor that should be repaid with oneself.'Meng Yu: 'Is this fox really the officer I knew in my past life?'

“I will conquer all of your women.”

“I will destroy you in your strongest.”

“System? Golden Finger? Cheat? Old Grandpa? Nothing will stop you from getting defeated by me.”

Jack, who got a second chance will not listen to his rationality anymore. He will do what his heart wanted from the very beginning. He will enjoy this reincarnation to its fullest.