Save a Failed Idol's Life - Chapter 260:

When Li Xianyu was 20 years old, he received his father’s inheritance, an 18-year-old great-grandmother who was incredibly beautiful.

Li Xianyu: “Great-Grandma, why are you so young?”

Great-Grandma: “That’s because I died when I was 18 years old.”

- Description from Novelupdates

I am reborn as a minor character and the mother of the main character, the deposed ruler Leriana Ashford.My husband's younger brother will stage a rebellion against him, and only my young children will manage to escape. And the unfortunate Queen Leriane faces a bleak end. According to the plot, my heroine will sacrifice her life during the rebellion to save her children.Except she won't! Dying at twenty-seven is too soon for me and I'm going to change the tragic plot of this novella.I was lucky enough to be reborn ten years before the events of the novel began. At a time when the future King Philip and his brother Razor had just fallen in love with me at the Royal Academy, and their fight for me led to a feud. To survive - I decided not to become queen and live a quiet life with my father the Duke. And in order to rid myself of these two, I had to go to extreme measures.I decided to start dating the daughter of the cursed Duke, who is feared and hated by the entire academy.

Kai of the Sorcerer’s Tower is one of the last mages left, barely surviving in a world ruled by creatures of the dark — where the era of mages ended, and most of the lands got contaminated with dead mana. To save his world and fulfil his master’s last wish, he put himself through a forbidden ritual, risking his soul being ripped into pieces to make his way into the past. In an era with abundant mana — an era yet to enter the Golden Era of Magic. Things go wrong, of course, as they always do, and he finds himself thousands of years before the world fell to mana contamination — in the body of a young lord, Arzan. All is not well, though, as the young lord was murdered by someone right at the cusp of a beast wave threatening the territory, while larger threats loom on the horizon. There was a lot to do for Kai to regain his former strength in this time of primitive technology, but then again, he might just be able to change that.