Toaru Majutsu no Index: New Testament - Volume 18, Epilogue: Bursting Malice - Devil_in_Evil.

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

A tale about the former leader of a special organization that served under royalty, now leaving his past life behind and unintentionally getting involved with the martial world.

Turned into a vampire with no political backing, wealth, or power, Dylan immediately tries to become the strongest there is. Facing numerous dungeon breaks and a coming invasion of unknown origin, Dylan must do everything he can to fight back. In the process, Dylan tries to make the world a better place in his way, by taking control of as much land and women as he can. Watch as Dylan amasses power and influence among monsters and humans and rises to the top in more ways than one.

(1v1, pure and sweet) Xiliang’s Prince Residence.With a tiger-like energy and at just 5 years old, Little Prince Xiao Moxi saw his mother dash off to the fields again, and his steamed bun-like face scrunched up in frustration.Looking grievously at his father beside him, he complained with an air of worldly wisdom, “Father, how did you fall for my mother, who likes to run off all the time?”Xiao Yeyang gave his precociously mature son a sidelong glance, then pretended to ponder the question.Indeed, why had he fallen for that woman?After a long silence…“Who knows? Maybe I got my head caught in a door!”Sharing a look of mutual commiseration, father and son let out a helpless sigh in unison.What do you do when you’re stuck with a woman who’s never at home?There’s only one thing to do with your own Princess Consort (mother)—spoil her, of course!…Transported to ancient times with a space filled with rice flowers, all she wanted was to quietly live out her life in the fields. Unexpectedly, with a father who was a county magistrate, she was forced to leave the countryside for the city!Life in the city was bustling with activities, and in order to have a say at home, she bought estates, grew flowers and medicinal herbs, and developed high-yield, high-quality grain varieties. Remarkably, she helped her father, who had been a county magistrate for nine years, to rise step by step, bringing the lowborn Yan Family into Beijing’s elite circles!This is a story of a noble daughter from a humble family aiding her clan to thrive and prosper, and a sweet love story of mutual success and growing together!Male lead: In front of others, he is the prideful Little Prince, the domineering Prince of Xiliang. In front of the female lead, he is a soft and tender-hearted man.Female lead: Clearheaded in all matters, warm-hearted and self-reliant!