MTL - The Black Tech Life of Scum - Chapter 89 : Dark horse, 1 group.

Zhang Yan worked tirelessly for three years, all to save money and buy a house.But in the end, he discovered that all his money had been secretly transferred by his fiancée to her ex-boyfriend to fund his startup.In his fury, the God-Level Choice System was activated.1. Forgive her and receive the title “Enduring Green Turtle.”2. “Who doesn’t have an ex?” Call my ex-girlfriend and say, “I regret it. I want to get back together with you.” Reward: 30 million yuan and a “1 Yuan House Purchase Voucher.”Was there even a choice to make!?Without hesitation, Zhang Yan called his ex-girlfriend and said, “I regret it. I want to get back together with you.”“I’ll be there right away.”Fifteen minutes later, a breathtaking beauty, scoring 99 out of 100, arrived in a Lamborghini… with a household registration book in hand.(The synopsis is a bit weak, please read the main story.)

After successfully reaching the Core Formation Stage and forming his Golden Core, Bai Langtian was betrayed by his own Master. His core was ripped from his body, and he was thrown off a mountain cliff into a valley full of demonic beasts.Thankfully, he survived the fall, and met his senior sister, Shangguan Yue Ling.She too had been betrayed by the same Master and pushed into this valley ten years ago. Ever since, she had been surviving alone by eating the corrupted flesh of demonic beasts.Now, Yue Ling revealed to Langtian a new path of cultivation:Demonic Cultivation.To reclaim his strength and take revenge, he must consume the flesh and essence of ten thousand demonic beasts.

After breaking up with his girlfriend, he accidentally acquired a genius system and rose from there against the heavens, becoming invincible..

- Description from Novelupdates

She is a descendant of an Ancient Chinese Aristocratic family. Having just transmigrated into a young lady’s body filled with aphrodisiacs, she had no choice but to pounce at a random man upon arrival.