REALISTIC ISEKAI: I didn't read this in my novels! - Chapter 41: Anger

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

After crossing into another world, he became an impostor City Lord, with a domain spanning five hundred miles and a sister who was a national beauty.He also had to revitalize a family that was teetering on the brink of collapse. As a college junior, Lanling felt overwhelmed by the pressure.Endowed with the power of Yao Xing, he could directly devour others' cultivation and claim it as his own. And his sole mission in crossing into this other world was: to destroy it!From City Lord of Tianshui, to the queen's husband, to the World-Ending Demon Emperor, he eventually became the king of the entire world!…Note: I've been in the industry for 12 years, published over a hundred books, and this is my eighth book, all of which are completed. With previous works like 《Nine Yang Sword Saint》 and “Mech Battle Emperor” being bestsellers with tens of thousands of subscriptions, you can read with confidence.

She is an elder miss from a modern secret society family. She is very cold and heartless, but her appearance is very enchanting. She thinks of men as playthings. She was schemed against and her body was thrown into the sea.

This is just a simple, sweet romantic moments.From A Silent Voice, I Want to Eat Your Pancreas, Your Name, Saekano: How to Raise a Boring Girlfriend, My Teen Romantic Comedy SNAFU, Durarara, and etc