Becoming evil makes you ten times stronger, but becoming a demon gives you hundredfold strength - Chapter 1 - Do not do evil because it is small

Dong Xi transmigrated, but she was neither the female lead nor the villainess, but a tragic side character in a book. Even though she was a proper rich daughter, her mother used her as a substitute for her youngest sister, and sent her to train as a cultivator at the top cultivator sect in the world. Though she was initiated at eight years old and trained for eight years, she was talentless and didn’t have much experience. Eventually, her younger sister was recruited because of her outstanding talent, while Dong Xi was banished after it was revealed that she was just a substitute.

After that, someone caught her, imprisoned her, and tormented her for two years just because she was attractive. Though she was rescued by a senior disciple from the cultivator sect, it turned out that he did it to avenge her younger sister, and tortured her to death. When Dong Xi transmigrated, it was just after she was initiated and began life as a cultivator. She decided that she would do her best, improve her cultivation, and survive! Eating? Sleeping? All that was a waste of time! If there was a cultivator who practiced sword cultivation a thousand times per day, she would do two thousand!

Eight years later, when her younger sister was recruited for her talent, Dong Xi promptly packed her bags and left, leaving the cultivator sect panicking and wondering who had taken her away! Su Cheng, the most powerful demon lord: Who dares harm my beloved wife?! This means war! Dong Xi, still running away: What? Who are you? Su Cheng: Don’t you remember the snake you counted stars with years ago, beloved?

Mo Ran felt that taking Chu Wanning as his master was a mistake.

His Shizun was just so similar to a cat, while he was like a silly dog.

Dogs and cats were biologically different. The silly dog hadn’t originally intended to put his furry paws out towards that cat.

He originally thought that dogs should be with dogs, like his senior brother, who was beautiful and docile, like a cute Japanese Spitz. They would look so good together.

But after dying and coming back to life, after living two lifetimes, the one he’d brought back to his den both times was that snow-white kitty Shizun that he didn’t even have his eye on at first.

- Description from Novelupdates

Tang Nuan, the cannon fodder supporting female in a sweet pampering novel, woke up after an accident and decided to get rid of her fate after she foresaw her tragic future in advance. The first thing she did was to break off the engagement with her wealthy fiancé. She felt that she knew the plot in advance and also knew the secret of her fiancé Ye Shuyan’s mind-reading ability, so she would be able to quit the marriage smoothly. However, she did not expect Ye Shuyan’s mind-reading ability limited to a three-meter distance would be an exception to her.

Ye Shuyan, who has always been with Tang Nuan out of responsibility, found that his fiancée was completely different from what he imagined after he had the mind-reading skills. He developed a feeling of admiration, so he, who firmly did not want to break off the engagement, and Tang Nuan started a series of battles of wits and courage.

The two protagonists redeemed each other in the struggle between breaking off and not breaking off the engagement, facing their feelings sincerely, and reaping sweet love and marriage.

- Description from Novelupdates

I am merely a reviewer, albeit the products I review are slightly different. For example, I review quantum computers, artificial intelligence, anti-gravity mech armor, planetary engines, sublight colonial ships, stellar detonators, etc…