Toaru Majutsu no Index - Volume 16, Chapter 1: From Peace to Ruin on the Proceeding Path. Battle_of_Collapse.

The world where the Hero and the Demon King continue to oppose each other. The grand magic from the Hero and the Demon King cross over worlds and exploded in the classroom of a certain high school.

The students who died in the explosion will be reincarnated in a different world. The protagonist, who had the lowest reputation in the class, was reincarnated into a spider. Nevertheless, she adapted quickly to the present condition with strong willpower.

This is a story of she who has become a spider trying whatever she can to live.

He is a legendary business powerhouse, a King with a business empire. She is just an ordinary female student. A deal, – a paper marriage, a marriage for four years. Four years later, she turned away fearlessly. She thought that their path would never cross again, but he took her in his stride and refused to let go of everything about her, even interfering with her getting close to other men!

“Luo Yibei, we’ve already divorced! We’re finished! Over!”

“Yeah?”

She had to ask what he meant.

And he shoved a small bun in her bosom with a look of disapproval.

- Description from Novelupdates

【Time Travel + Workplace Competition + No Lazing Around + Ambitious Female Lead】Overachiever Shen Wei traveled through time and found herself as the lowest-ranking maid in the grand residence of the Yan Prince.The Yan Prince held a prestigious position, but his consorts were all content to live dull lives. The noble-born princess consort was as tranquil as a chrysanthemum; the concubine sought a life of monogamy; the reincarnated woman was utterly disillusioned with the Yan Prince and had given up on striving for anything; and the other timid concubines dared not make a move…The queen of workplace competition, Shen Wei, declared: Don’t stop me! I’m going to outwork these unambitious slackers!…The Yan Prince had grown accustomed to the stagnant atmosphere in his harem, until a particularly skilled courtesan appeared.This concubine was stunningly beautiful, adept at both literature and dance, hardworking, and always brought him fresh excitement. The Prince couldn’t help but take a second, then a lifetime-long, look at her.Years later, Shen Wei became the all-powerful Imperial Noble Consort, with children and the emperor’s exclusive favor.Meanwhile, the princess consort remained as tranquil as ever; the concubine was aging and had yet to experience a monogamous life; and the reincarnated woman was still eating simple meals in her modest abode…After half a lifetime of striving, Shen Wei finally reached retirement and revealed her true nature, fully embracing a life of leisure. The retired emperor interjected: “You competed for favor just to retire?”Shen Wei snacked on melon seeds: “What else?”Living is all about retirement!The retired emperor was even more surprised to find, in midlife, that other men were vying for his wife’s affections!